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Finding the Fourth Proportional to 15,082.55, 20,812.97 and 9,110.69

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Solution

The fourth proportional to 15,082.55, 20,812.97 and 9,110.69 is: 12,572.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,082.55 : 20,812.97 = 9,110.69 : x
  2. Step 2: Convert to fraction form
    15,082.55/20,812.97 = 9,110.69/x
  3. Step 3: Cross multiply
    15,082.55x = 20,812.97 × 9,110.69
  4. Step 4: Simplify right side
    15,082.55x = 189,620,436.36
  5. Step 5: Solve for x
    x = 189,620,436.36/15,082.55
  6. Step 6: Final answer
    x = 12,572.18

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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.