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Finding the Fourth Proportional to 15,082.10, 20,815.45 and 8,707.42

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Solution

The fourth proportional to 15,082.10, 20,815.45 and 8,707.42 is: 12,017.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,082.10 : 20,815.45 = 8,707.42 : x
  2. Step 2: Convert to fraction form
    15,082.10/20,815.45 = 8,707.42/x
  3. Step 3: Cross multiply
    15,082.10x = 20,815.45 × 8,707.42
  4. Step 4: Simplify right side
    15,082.10x = 181,248,813.60
  5. Step 5: Solve for x
    x = 181,248,813.60/15,082.10
  6. Step 6: Final answer
    x = 12,017.48

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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.