Home / 10,961.60-16,442.40-9,139.10

Finding the Fourth Proportional to 10,961.60, 16,442.40 and 9,139.10

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Solution

The fourth proportional to 10,961.60, 16,442.40 and 9,139.10 is: 13,708.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,961.60 : 16,442.40 = 9,139.10 : x
  2. Step 2: Convert to fraction form
    10,961.60/16,442.40 = 9,139.10/x
  3. Step 3: Cross multiply
    10,961.60x = 16,442.40 × 9,139.10
  4. Step 4: Simplify right side
    10,961.60x = 150,268,737.84
  5. Step 5: Solve for x
    x = 150,268,737.84/10,961.60
  6. Step 6: Final answer
    x = 13,708.65

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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.