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Finding the Fourth Proportional to 12,387.74, 18,535.03 and 7,371.64

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Solution

The fourth proportional to 12,387.74, 18,535.03 and 7,371.64 is: 11,029.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.74 : 18,535.03 = 7,371.64 : x
  2. Step 2: Convert to fraction form
    12,387.74/18,535.03 = 7,371.64/x
  3. Step 3: Cross multiply
    12,387.74x = 18,535.03 × 7,371.64
  4. Step 4: Simplify right side
    12,387.74x = 136,633,573.29
  5. Step 5: Solve for x
    x = 136,633,573.29/12,387.74
  6. Step 6: Final answer
    x = 11,029.75

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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.