Home / 40,372.60-55,656.45-28,398.78

Finding the Fourth Proportional to 40,372.60, 55,656.45 and 28,398.78

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Solution

The fourth proportional to 40,372.60, 55,656.45 and 28,398.78 is: 39,149.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,372.60 : 55,656.45 = 28,398.78 : x
  2. Step 2: Convert to fraction form
    40,372.60/55,656.45 = 28,398.78/x
  3. Step 3: Cross multiply
    40,372.60x = 55,656.45 × 28,398.78
  4. Step 4: Simplify right side
    40,372.60x = 1,580,575,279.13
  5. Step 5: Solve for x
    x = 1,580,575,279.13/40,372.60
  6. Step 6: Final answer
    x = 39,149.70

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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.