Home / 39,418.50-54,398.52-21,515.16

Finding the Fourth Proportional to 39,418.50, 54,398.52 and 21,515.16

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Solution

The fourth proportional to 39,418.50, 54,398.52 and 21,515.16 is: 29,691.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,418.50 : 54,398.52 = 21,515.16 : x
  2. Step 2: Convert to fraction form
    39,418.50/54,398.52 = 21,515.16/x
  3. Step 3: Cross multiply
    39,418.50x = 54,398.52 × 21,515.16
  4. Step 4: Simplify right side
    39,418.50x = 1,170,392,861.56
  5. Step 5: Solve for x
    x = 1,170,392,861.56/39,418.50
  6. Step 6: Final answer
    x = 29,691.46

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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.