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Finding the Fourth Proportional to 10,917.10, 16,375.65 and 9,912.70

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Solution

The fourth proportional to 10,917.10, 16,375.65 and 9,912.70 is: 14,869.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,917.10 : 16,375.65 = 9,912.70 : x
  2. Step 2: Convert to fraction form
    10,917.10/16,375.65 = 9,912.70/x
  3. Step 3: Cross multiply
    10,917.10x = 16,375.65 × 9,912.70
  4. Step 4: Simplify right side
    10,917.10x = 162,326,905.76
  5. Step 5: Solve for x
    x = 162,326,905.76/10,917.10
  6. Step 6: Final answer
    x = 14,869.05

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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.