Home / 20,691.78-31,037.97-5,900.70

Finding the Fourth Proportional to 20,691.78, 31,037.97 and 5,900.70

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Solution

The fourth proportional to 20,691.78, 31,037.97 and 5,900.70 is: 8,851.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.78 : 31,037.97 = 5,900.70 : x
  2. Step 2: Convert to fraction form
    20,691.78/31,037.97 = 5,900.70/x
  3. Step 3: Cross multiply
    20,691.78x = 31,037.97 × 5,900.70
  4. Step 4: Simplify right side
    20,691.78x = 183,145,712.31
  5. Step 5: Solve for x
    x = 183,145,712.31/20,691.78
  6. Step 6: Final answer
    x = 8,851.13

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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.