Home / 12,428.32-17,149.17-7,390.81

Finding the Fourth Proportional to 12,428.32, 17,149.17 and 7,390.81

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Solution

The fourth proportional to 12,428.32, 17,149.17 and 7,390.81 is: 10,198.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.32 : 17,149.17 = 7,390.81 : x
  2. Step 2: Convert to fraction form
    12,428.32/17,149.17 = 7,390.81/x
  3. Step 3: Cross multiply
    12,428.32x = 17,149.17 × 7,390.81
  4. Step 4: Simplify right side
    12,428.32x = 126,746,257.13
  5. Step 5: Solve for x
    x = 126,746,257.13/12,428.32
  6. Step 6: Final answer
    x = 10,198.18

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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.