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Finding the Fourth Proportional to 12,141.80, 18,211.17 and 3,377.39

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Solution

The fourth proportional to 12,141.80, 18,211.17 and 3,377.39 is: 5,065.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,141.80 : 18,211.17 = 3,377.39 : x
  2. Step 2: Convert to fraction form
    12,141.80/18,211.17 = 3,377.39/x
  3. Step 3: Cross multiply
    12,141.80x = 18,211.17 × 3,377.39
  4. Step 4: Simplify right side
    12,141.80x = 61,506,223.45
  5. Step 5: Solve for x
    x = 61,506,223.45/12,141.80
  6. Step 6: Final answer
    x = 5,065.66

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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.