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Finding the Fourth Proportional to 8,957.57, 12,333.21 and 8,127.20

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Solution

The fourth proportional to 8,957.57, 12,333.21 and 8,127.20 is: 11,189.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,957.57 : 12,333.21 = 8,127.20 : x
  2. Step 2: Convert to fraction form
    8,957.57/12,333.21 = 8,127.20/x
  3. Step 3: Cross multiply
    8,957.57x = 12,333.21 × 8,127.20
  4. Step 4: Simplify right side
    8,957.57x = 100,234,433.12
  5. Step 5: Solve for x
    x = 100,234,433.12/8,957.57
  6. Step 6: Final answer
    x = 11,189.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.