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Finding the Fourth Proportional to 12,248.14, 18,375.64 and 3,928.64

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Solution

The fourth proportional to 12,248.14, 18,375.64 and 3,928.64 is: 5,894.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,248.14 : 18,375.64 = 3,928.64 : x
  2. Step 2: Convert to fraction form
    12,248.14/18,375.64 = 3,928.64/x
  3. Step 3: Cross multiply
    12,248.14x = 18,375.64 × 3,928.64
  4. Step 4: Simplify right side
    12,248.14x = 72,191,274.33
  5. Step 5: Solve for x
    x = 72,191,274.33/12,248.14
  6. Step 6: Final answer
    x = 5,894.06

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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.