Home / 8,102.72-12,159.54-3,171.74

Finding the Fourth Proportional to 8,102.72, 12,159.54 and 3,171.74

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Solution

The fourth proportional to 8,102.72, 12,159.54 and 3,171.74 is: 4,759.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,102.72 : 12,159.54 = 3,171.74 : x
  2. Step 2: Convert to fraction form
    8,102.72/12,159.54 = 3,171.74/x
  3. Step 3: Cross multiply
    8,102.72x = 12,159.54 × 3,171.74
  4. Step 4: Simplify right side
    8,102.72x = 38,566,838.60
  5. Step 5: Solve for x
    x = 38,566,838.60/8,102.72
  6. Step 6: Final answer
    x = 4,759.74

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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.