Home / 10,931.20-15,081.62-6,456.54

Finding the Fourth Proportional to 10,931.20, 15,081.62 and 6,456.54

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Solution

The fourth proportional to 10,931.20, 15,081.62 and 6,456.54 is: 8,908.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,931.20 : 15,081.62 = 6,456.54 : x
  2. Step 2: Convert to fraction form
    10,931.20/15,081.62 = 6,456.54/x
  3. Step 3: Cross multiply
    10,931.20x = 15,081.62 × 6,456.54
  4. Step 4: Simplify right side
    10,931.20x = 97,375,082.79
  5. Step 5: Solve for x
    x = 97,375,082.79/10,931.20
  6. Step 6: Final answer
    x = 8,908.00

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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.