Home / 20,881.26-31,306.41-7,731.18

Finding the Fourth Proportional to 20,881.26, 31,306.41 and 7,731.18

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Solution

The fourth proportional to 20,881.26, 31,306.41 and 7,731.18 is: 11,591.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.26 : 31,306.41 = 7,731.18 : x
  2. Step 2: Convert to fraction form
    20,881.26/31,306.41 = 7,731.18/x
  3. Step 3: Cross multiply
    20,881.26x = 31,306.41 × 7,731.18
  4. Step 4: Simplify right side
    20,881.26x = 242,035,490.86
  5. Step 5: Solve for x
    x = 242,035,490.86/20,881.26
  6. Step 6: Final answer
    x = 11,591.04

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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.