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Finding the Fourth Proportional to 10,912.14, 15,042.88 and 8,674.92

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Solution

The fourth proportional to 10,912.14, 15,042.88 and 8,674.92 is: 11,958.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,912.14 : 15,042.88 = 8,674.92 : x
  2. Step 2: Convert to fraction form
    10,912.14/15,042.88 = 8,674.92/x
  3. Step 3: Cross multiply
    10,912.14x = 15,042.88 × 8,674.92
  4. Step 4: Simplify right side
    10,912.14x = 130,495,780.57
  5. Step 5: Solve for x
    x = 130,495,780.57/10,912.14
  6. Step 6: Final answer
    x = 11,958.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.