Home / 10,121.56-15,188.10-8,082.52

Finding the Fourth Proportional to 10,121.56, 15,188.10 and 8,082.52

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Solution

The fourth proportional to 10,121.56, 15,188.10 and 8,082.52 is: 12,128.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,121.56 : 15,188.10 = 8,082.52 : x
  2. Step 2: Convert to fraction form
    10,121.56/15,188.10 = 8,082.52/x
  3. Step 3: Cross multiply
    10,121.56x = 15,188.10 × 8,082.52
  4. Step 4: Simplify right side
    10,121.56x = 122,758,122.01
  5. Step 5: Solve for x
    x = 122,758,122.01/10,121.56
  6. Step 6: Final answer
    x = 12,128.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.