Home / 20,082.31-27,712.33-11,129.29

Finding the Fourth Proportional to 20,082.31, 27,712.33 and 11,129.29

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Solution

The fourth proportional to 20,082.31, 27,712.33 and 11,129.29 is: 15,357.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,082.31 : 27,712.33 = 11,129.29 : x
  2. Step 2: Convert to fraction form
    20,082.31/27,712.33 = 11,129.29/x
  3. Step 3: Cross multiply
    20,082.31x = 27,712.33 × 11,129.29
  4. Step 4: Simplify right side
    20,082.31x = 308,418,557.15
  5. Step 5: Solve for x
    x = 308,418,557.15/20,082.31
  6. Step 6: Final answer
    x = 15,357.72

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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.