Home / 39,387.14-54,355.18-21,483.80

Finding the Fourth Proportional to 39,387.14, 54,355.18 and 21,483.80

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Solution

The fourth proportional to 39,387.14, 54,355.18 and 21,483.80 is: 29,648.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,387.14 : 54,355.18 = 21,483.80 : x
  2. Step 2: Convert to fraction form
    39,387.14/54,355.18 = 21,483.80/x
  3. Step 3: Cross multiply
    39,387.14x = 54,355.18 × 21,483.80
  4. Step 4: Simplify right side
    39,387.14x = 1,167,755,816.08
  5. Step 5: Solve for x
    x = 1,167,755,816.08/39,387.14
  6. Step 6: Final answer
    x = 29,648.15

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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.