Home / 21,998.01-30,350.25-13,491.39

Finding the Fourth Proportional to 21,998.01, 30,350.25 and 13,491.39

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Solution

The fourth proportional to 21,998.01, 30,350.25 and 13,491.39 is: 18,613.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,998.01 : 30,350.25 = 13,491.39 : x
  2. Step 2: Convert to fraction form
    21,998.01/30,350.25 = 13,491.39/x
  3. Step 3: Cross multiply
    21,998.01x = 30,350.25 × 13,491.39
  4. Step 4: Simplify right side
    21,998.01x = 409,467,059.35
  5. Step 5: Solve for x
    x = 409,467,059.35/21,998.01
  6. Step 6: Final answer
    x = 18,613.82

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.