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Finding the Fourth Proportional to 15,372.68, 21,214.08 and 8,658.97

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Solution

The fourth proportional to 15,372.68, 21,214.08 and 8,658.97 is: 11,949.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,372.68 : 21,214.08 = 8,658.97 : x
  2. Step 2: Convert to fraction form
    15,372.68/21,214.08 = 8,658.97/x
  3. Step 3: Cross multiply
    15,372.68x = 21,214.08 × 8,658.97
  4. Step 4: Simplify right side
    15,372.68x = 183,692,082.30
  5. Step 5: Solve for x
    x = 183,692,082.30/15,372.68
  6. Step 6: Final answer
    x = 11,949.26

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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.