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Finding the Fourth Proportional to 12,499.80, 18,735.39 and 5,916.66

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Solution

The fourth proportional to 12,499.80, 18,735.39 and 5,916.66 is: 8,868.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,499.80 : 18,735.39 = 5,916.66 : x
  2. Step 2: Convert to fraction form
    12,499.80/18,735.39 = 5,916.66/x
  3. Step 3: Cross multiply
    12,499.80x = 18,735.39 × 5,916.66
  4. Step 4: Simplify right side
    12,499.80x = 110,850,932.60
  5. Step 5: Solve for x
    x = 110,850,932.60/12,499.80
  6. Step 6: Final answer
    x = 8,868.22

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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.