Home / 20,731.10-31,098.51-6,691.46

Finding the Fourth Proportional to 20,731.10, 31,098.51 and 6,691.46

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Solution

The fourth proportional to 20,731.10, 31,098.51 and 6,691.46 is: 10,037.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.10 : 31,098.51 = 6,691.46 : x
  2. Step 2: Convert to fraction form
    20,731.10/31,098.51 = 6,691.46/x
  3. Step 3: Cross multiply
    20,731.10x = 31,098.51 × 6,691.46
  4. Step 4: Simplify right side
    20,731.10x = 208,094,280.23
  5. Step 5: Solve for x
    x = 208,094,280.23/20,731.10
  6. Step 6: Final answer
    x = 10,037.79

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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.