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Finding the Fourth Proportional to 12,625.71, 18,938.61 and 3,860.61

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Solution

The fourth proportional to 12,625.71, 18,938.61 and 3,860.61 is: 5,790.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,625.71 : 18,938.61 = 3,860.61 : x
  2. Step 2: Convert to fraction form
    12,625.71/18,938.61 = 3,860.61/x
  3. Step 3: Cross multiply
    12,625.71x = 18,938.61 × 3,860.61
  4. Step 4: Simplify right side
    12,625.71x = 73,114,587.15
  5. Step 5: Solve for x
    x = 73,114,587.15/12,625.71
  6. Step 6: Final answer
    x = 5,790.93

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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.