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Finding the Fourth Proportional to 12,141.68, 18,215.10 and 6,879.15

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Solution

The fourth proportional to 12,141.68, 18,215.10 and 6,879.15 is: 10,320.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,141.68 : 18,215.10 = 6,879.15 : x
  2. Step 2: Convert to fraction form
    12,141.68/18,215.10 = 6,879.15/x
  3. Step 3: Cross multiply
    12,141.68x = 18,215.10 × 6,879.15
  4. Step 4: Simplify right side
    12,141.68x = 125,304,405.17
  5. Step 5: Solve for x
    x = 125,304,405.17/12,141.68
  6. Step 6: Final answer
    x = 10,320.19

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1.5x scale

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.