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Finding the Fourth Proportional to 20,691.88, 31,037.88 and 7,544.24

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Solution

The fourth proportional to 20,691.88, 31,037.88 and 7,544.24 is: 11,316.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.88 : 31,037.88 = 7,544.24 : x
  2. Step 2: Convert to fraction form
    20,691.88/31,037.88 = 7,544.24/x
  3. Step 3: Cross multiply
    20,691.88x = 31,037.88 × 7,544.24
  4. Step 4: Simplify right side
    20,691.88x = 234,157,215.81
  5. Step 5: Solve for x
    x = 234,157,215.81/20,691.88
  6. Step 6: Final answer
    x = 11,316.38

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1.5x scale

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.