Home / 39,428.28-54,411.13-21,523.30

Finding the Fourth Proportional to 39,428.28, 54,411.13 and 21,523.30

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Solution

The fourth proportional to 39,428.28, 54,411.13 and 21,523.30 is: 29,702.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,428.28 : 54,411.13 = 21,523.30 : x
  2. Step 2: Convert to fraction form
    39,428.28/54,411.13 = 21,523.30/x
  3. Step 3: Cross multiply
    39,428.28x = 54,411.13 × 21,523.30
  4. Step 4: Simplify right side
    39,428.28x = 1,171,107,074.33
  5. Step 5: Solve for x
    x = 1,171,107,074.33/39,428.28
  6. Step 6: Final answer
    x = 29,702.21

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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.