Home / 31,613.12-43,635.84-20,432.96

Finding the Fourth Proportional to 31,613.12, 43,635.84 and 20,432.96

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Solution

The fourth proportional to 31,613.12, 43,635.84 and 20,432.96 is: 28,203.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,613.12 : 43,635.84 = 20,432.96 : x
  2. Step 2: Convert to fraction form
    31,613.12/43,635.84 = 20,432.96/x
  3. Step 3: Cross multiply
    31,613.12x = 43,635.84 × 20,432.96
  4. Step 4: Simplify right side
    31,613.12x = 891,609,373.29
  5. Step 5: Solve for x
    x = 891,609,373.29/31,613.12
  6. Step 6: Final answer
    x = 28,203.78

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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.