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Finding the Fourth Proportional to 15,082.10, 20,813.30 and 8,795.68

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Solution

The fourth proportional to 15,082.10, 20,813.30 and 8,795.68 is: 12,138.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,082.10 : 20,813.30 = 8,795.68 : x
  2. Step 2: Convert to fraction form
    15,082.10/20,813.30 = 8,795.68/x
  3. Step 3: Cross multiply
    15,082.10x = 20,813.30 × 8,795.68
  4. Step 4: Simplify right side
    15,082.10x = 183,067,126.54
  5. Step 5: Solve for x
    x = 183,067,126.54/15,082.10
  6. Step 6: Final answer
    x = 12,138.04

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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.