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Finding the Fourth Proportional to 10,998.60, 16,497.90 and 5,155.80

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Solution

The fourth proportional to 10,998.60, 16,497.90 and 5,155.80 is: 7,733.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,998.60 : 16,497.90 = 5,155.80 : x
  2. Step 2: Convert to fraction form
    10,998.60/16,497.90 = 5,155.80/x
  3. Step 3: Cross multiply
    10,998.60x = 16,497.90 × 5,155.80
  4. Step 4: Simplify right side
    10,998.60x = 85,059,872.82
  5. Step 5: Solve for x
    x = 85,059,872.82/10,998.60
  6. Step 6: Final answer
    x = 7,733.70

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Similar ratio
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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.