Home / 8,076.85-12,120.87-3,146.53

Finding the Fourth Proportional to 8,076.85, 12,120.87 and 3,146.53

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Solution

The fourth proportional to 8,076.85, 12,120.87 and 3,146.53 is: 4,721.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,076.85 : 12,120.87 = 3,146.53 : x
  2. Step 2: Convert to fraction form
    8,076.85/12,120.87 = 3,146.53/x
  3. Step 3: Cross multiply
    8,076.85x = 12,120.87 × 3,146.53
  4. Step 4: Simplify right side
    8,076.85x = 38,138,681.08
  5. Step 5: Solve for x
    x = 38,138,681.08/8,076.85
  6. Step 6: Final answer
    x = 4,721.97

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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.