Home / 8,371.90-12,557.80-3,177.78

Finding the Fourth Proportional to 8,371.90, 12,557.80 and 3,177.78

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Solution

The fourth proportional to 8,371.90, 12,557.80 and 3,177.78 is: 4,766.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,371.90 : 12,557.80 = 3,177.78 : x
  2. Step 2: Convert to fraction form
    8,371.90/12,557.80 = 3,177.78/x
  3. Step 3: Cross multiply
    8,371.90x = 12,557.80 × 3,177.78
  4. Step 4: Simplify right side
    8,371.90x = 39,905,925.68
  5. Step 5: Solve for x
    x = 39,905,925.68/8,371.90
  6. Step 6: Final answer
    x = 4,766.65

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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.