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Finding the Fourth Proportional to 19,616.40, 27,070.80 and 10,663.92

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Solution

The fourth proportional to 19,616.40, 27,070.80 and 10,663.92 is: 14,716.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,616.40 : 27,070.80 = 10,663.92 : x
  2. Step 2: Convert to fraction form
    19,616.40/27,070.80 = 10,663.92/x
  3. Step 3: Cross multiply
    19,616.40x = 27,070.80 × 10,663.92
  4. Step 4: Simplify right side
    19,616.40x = 288,680,845.54
  5. Step 5: Solve for x
    x = 288,680,845.54/19,616.40
  6. Step 6: Final answer
    x = 14,716.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.