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Finding the Fourth Proportional to 12,248.12, 18,375.02 and 5,228.40

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Solution

The fourth proportional to 12,248.12, 18,375.02 and 5,228.40 is: 7,843.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,248.12 : 18,375.02 = 5,228.40 : x
  2. Step 2: Convert to fraction form
    12,248.12/18,375.02 = 5,228.40/x
  3. Step 3: Cross multiply
    12,248.12x = 18,375.02 × 5,228.40
  4. Step 4: Simplify right side
    12,248.12x = 96,071,954.57
  5. Step 5: Solve for x
    x = 96,071,954.57/12,248.12
  6. Step 6: Final answer
    x = 7,843.81

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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.