Home / 39,630.52-54,690-21,726.28

Finding the Fourth Proportional to 39,630.52, 54,690 and 21,726.28

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Solution

The fourth proportional to 39,630.52, 54,690 and 21,726.28 is: 29,982.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,630.52 : 54,690 = 21,726.28 : x
  2. Step 2: Convert to fraction form
    39,630.52/54,690 = 21,726.28/x
  3. Step 3: Cross multiply
    39,630.52x = 54,690 × 21,726.28
  4. Step 4: Simplify right side
    39,630.52x = 1,188,210,253.20
  5. Step 5: Solve for x
    x = 1,188,210,253.20/39,630.52
  6. Step 6: Final answer
    x = 29,982.20

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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.