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Finding the Fourth Proportional to 11,158.01, 15,414.08 and 8,916.95

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Solution

The fourth proportional to 11,158.01, 15,414.08 and 8,916.95 is: 12,318.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,158.01 : 15,414.08 = 8,916.95 : x
  2. Step 2: Convert to fraction form
    11,158.01/15,414.08 = 8,916.95/x
  3. Step 3: Cross multiply
    11,158.01x = 15,414.08 × 8,916.95
  4. Step 4: Simplify right side
    11,158.01x = 137,446,580.66
  5. Step 5: Solve for x
    x = 137,446,580.66/11,158.01
  6. Step 6: Final answer
    x = 12,318.20

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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.