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Finding the Fourth Proportional to 8,079.78, 12,114.72 and 3,143.68

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Solution

The fourth proportional to 8,079.78, 12,114.72 and 3,143.68 is: 4,713.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,079.78 : 12,114.72 = 3,143.68 : x
  2. Step 2: Convert to fraction form
    8,079.78/12,114.72 = 3,143.68/x
  3. Step 3: Cross multiply
    8,079.78x = 12,114.72 × 3,143.68
  4. Step 4: Simplify right side
    8,079.78x = 38,084,802.97
  5. Step 5: Solve for x
    x = 38,084,802.97/8,079.78
  6. Step 6: Final answer
    x = 4,713.59

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1.5x scale

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.