Home / 39,123.16-53,989.14-21,217.48

Finding the Fourth Proportional to 39,123.16, 53,989.14 and 21,217.48

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Solution

The fourth proportional to 39,123.16, 53,989.14 and 21,217.48 is: 29,279.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,123.16 : 53,989.14 = 21,217.48 : x
  2. Step 2: Convert to fraction form
    39,123.16/53,989.14 = 21,217.48/x
  3. Step 3: Cross multiply
    39,123.16x = 53,989.14 × 21,217.48
  4. Step 4: Simplify right side
    39,123.16x = 1,145,513,498.17
  5. Step 5: Solve for x
    x = 1,145,513,498.17/39,123.16
  6. Step 6: Final answer
    x = 29,279.68

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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.