Home / 39,578.29-54,618.14-21,429.21

Finding the Fourth Proportional to 39,578.29, 54,618.14 and 21,429.21

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Solution

The fourth proportional to 39,578.29, 54,618.14 and 21,429.21 is: 29,572.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,578.29 : 54,618.14 = 21,429.21 : x
  2. Step 2: Convert to fraction form
    39,578.29/54,618.14 = 21,429.21/x
  3. Step 3: Cross multiply
    39,578.29x = 54,618.14 × 21,429.21
  4. Step 4: Simplify right side
    39,578.29x = 1,170,423,591.87
  5. Step 5: Solve for x
    x = 1,170,423,591.87/39,578.29
  6. Step 6: Final answer
    x = 29,572.36

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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.