Home / 22,505.40-31,066.20-20,143.44

Finding the Fourth Proportional to 22,505.40, 31,066.20 and 20,143.44

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Solution

The fourth proportional to 22,505.40, 31,066.20 and 20,143.44 is: 27,805.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,505.40 : 31,066.20 = 20,143.44 : x
  2. Step 2: Convert to fraction form
    22,505.40/31,066.20 = 20,143.44/x
  3. Step 3: Cross multiply
    22,505.40x = 31,066.20 × 20,143.44
  4. Step 4: Simplify right side
    22,505.40x = 625,780,135.73
  5. Step 5: Solve for x
    x = 625,780,135.73/22,505.40
  6. Step 6: Final answer
    x = 27,805.78

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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.