Home / 18,431.28-25,436.16-10,879.92

Finding the Fourth Proportional to 18,431.28, 25,436.16 and 10,879.92

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Solution

The fourth proportional to 18,431.28, 25,436.16 and 10,879.92 is: 15,014.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,431.28 : 25,436.16 = 10,879.92 : x
  2. Step 2: Convert to fraction form
    18,431.28/25,436.16 = 10,879.92/x
  3. Step 3: Cross multiply
    18,431.28x = 25,436.16 × 10,879.92
  4. Step 4: Simplify right side
    18,431.28x = 276,743,385.91
  5. Step 5: Solve for x
    x = 276,743,385.91/18,431.28
  6. Step 6: Final answer
    x = 15,014.88

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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.