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Finding the Fourth Proportional to 15,082.73, 20,815.28 and 8,368.30

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Solution

The fourth proportional to 15,082.73, 20,815.28 and 8,368.30 is: 11,548.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,082.73 : 20,815.28 = 8,368.30 : x
  2. Step 2: Convert to fraction form
    15,082.73/20,815.28 = 8,368.30/x
  3. Step 3: Cross multiply
    15,082.73x = 20,815.28 × 8,368.30
  4. Step 4: Simplify right side
    15,082.73x = 174,188,507.62
  5. Step 5: Solve for x
    x = 174,188,507.62/15,082.73
  6. Step 6: Final answer
    x = 11,548.87

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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.