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Finding the Fourth Proportional to 15,160.88, 20,916.20 and 11,191.44

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Solution

The fourth proportional to 15,160.88, 20,916.20 and 11,191.44 is: 15,439.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,160.88 : 20,916.20 = 11,191.44 : x
  2. Step 2: Convert to fraction form
    15,160.88/20,916.20 = 11,191.44/x
  3. Step 3: Cross multiply
    15,160.88x = 20,916.20 × 11,191.44
  4. Step 4: Simplify right side
    15,160.88x = 234,082,397.33
  5. Step 5: Solve for x
    x = 234,082,397.33/15,160.88
  6. Step 6: Final answer
    x = 15,439.90

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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.