Home / 39,287.72-54,217.10-21,382.70

Finding the Fourth Proportional to 39,287.72, 54,217.10 and 21,382.70

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Solution

The fourth proportional to 39,287.72, 54,217.10 and 21,382.70 is: 29,508.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,287.72 : 54,217.10 = 21,382.70 : x
  2. Step 2: Convert to fraction form
    39,287.72/54,217.10 = 21,382.70/x
  3. Step 3: Cross multiply
    39,287.72x = 54,217.10 × 21,382.70
  4. Step 4: Simplify right side
    39,287.72x = 1,159,307,606.17
  5. Step 5: Solve for x
    x = 1,159,307,606.17/39,287.72
  6. Step 6: Final answer
    x = 29,508.15

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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.