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Finding the Fourth Proportional to 8,160.60, 12,230.10 and 7,231.80

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Solution

The fourth proportional to 8,160.60, 12,230.10 and 7,231.80 is: 10,838.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,160.60 : 12,230.10 = 7,231.80 : x
  2. Step 2: Convert to fraction form
    8,160.60/12,230.10 = 7,231.80/x
  3. Step 3: Cross multiply
    8,160.60x = 12,230.10 × 7,231.80
  4. Step 4: Simplify right side
    8,160.60x = 88,445,637.18
  5. Step 5: Solve for x
    x = 88,445,637.18/8,160.60
  6. Step 6: Final answer
    x = 10,838.13

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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.