Home / 20,981.24-31,475.12-7,127

Finding the Fourth Proportional to 20,981.24, 31,475.12 and 7,127

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Solution

The fourth proportional to 20,981.24, 31,475.12 and 7,127 is: 10,691.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.24 : 31,475.12 = 7,127 : x
  2. Step 2: Convert to fraction form
    20,981.24/31,475.12 = 7,127/x
  3. Step 3: Cross multiply
    20,981.24x = 31,475.12 × 7,127
  4. Step 4: Simplify right side
    20,981.24x = 224,323,180.24
  5. Step 5: Solve for x
    x = 224,323,180.24/20,981.24
  6. Step 6: Final answer
    x = 10,691.61

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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.