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Finding the Fourth Proportional to 19,666.98, 29,378.91 and 17,689.47

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Solution

The fourth proportional to 19,666.98, 29,378.91 and 17,689.47 is: 26,424.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,666.98 : 29,378.91 = 17,689.47 : x
  2. Step 2: Convert to fraction form
    19,666.98/29,378.91 = 17,689.47/x
  3. Step 3: Cross multiply
    19,666.98x = 29,378.91 × 17,689.47
  4. Step 4: Simplify right side
    19,666.98x = 519,697,347.08
  5. Step 5: Solve for x
    x = 519,697,347.08/19,666.98
  6. Step 6: Final answer
    x = 26,424.87

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Find fourth proportional to 9,833.49, 14,689.46 and 8,844.74
Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.