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Finding the Fourth Proportional to 8,108.40, 12,162.60 and 8,057.20

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Solution

The fourth proportional to 8,108.40, 12,162.60 and 8,057.20 is: 12,085.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,108.40 : 12,162.60 = 8,057.20 : x
  2. Step 2: Convert to fraction form
    8,108.40/12,162.60 = 8,057.20/x
  3. Step 3: Cross multiply
    8,108.40x = 12,162.60 × 8,057.20
  4. Step 4: Simplify right side
    8,108.40x = 97,996,500.72
  5. Step 5: Solve for x
    x = 97,996,500.72/8,108.40
  6. Step 6: Final answer
    x = 12,085.80

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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.