Home / 20,781.12-31,167.04-5,990.08

Finding the Fourth Proportional to 20,781.12, 31,167.04 and 5,990.08

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Solution

The fourth proportional to 20,781.12, 31,167.04 and 5,990.08 is: 8,983.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.12 : 31,167.04 = 5,990.08 : x
  2. Step 2: Convert to fraction form
    20,781.12/31,167.04 = 5,990.08/x
  3. Step 3: Cross multiply
    20,781.12x = 31,167.04 × 5,990.08
  4. Step 4: Simplify right side
    20,781.12x = 186,693,062.96
  5. Step 5: Solve for x
    x = 186,693,062.96/20,781.12
  6. Step 6: Final answer
    x = 8,983.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.