Home / 10,081.20-15,119.64-3,151.92

Finding the Fourth Proportional to 10,081.20, 15,119.64 and 3,151.92

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Solution

The fourth proportional to 10,081.20, 15,119.64 and 3,151.92 is: 4,727.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,081.20 : 15,119.64 = 3,151.92 : x
  2. Step 2: Convert to fraction form
    10,081.20/15,119.64 = 3,151.92/x
  3. Step 3: Cross multiply
    10,081.20x = 15,119.64 × 3,151.92
  4. Step 4: Simplify right side
    10,081.20x = 47,655,895.71
  5. Step 5: Solve for x
    x = 47,655,895.71/10,081.20
  6. Step 6: Final answer
    x = 4,727.20

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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.