Home / 20,691.92-31,037.88-5,109.84

Finding the Fourth Proportional to 20,691.92, 31,037.88 and 5,109.84

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Solution

The fourth proportional to 20,691.92, 31,037.88 and 5,109.84 is: 7,664.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.92 : 31,037.88 = 5,109.84 : x
  2. Step 2: Convert to fraction form
    20,691.92/31,037.88 = 5,109.84/x
  3. Step 3: Cross multiply
    20,691.92x = 31,037.88 × 5,109.84
  4. Step 4: Simplify right side
    20,691.92x = 158,598,600.74
  5. Step 5: Solve for x
    x = 158,598,600.74/20,691.92
  6. Step 6: Final answer
    x = 7,664.76

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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.