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Finding the Fourth Proportional to 8,426.88, 12,640.27 and 2,186.88

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Solution

The fourth proportional to 8,426.88, 12,640.27 and 2,186.88 is: 3,280.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,426.88 : 12,640.27 = 2,186.88 : x
  2. Step 2: Convert to fraction form
    8,426.88/12,640.27 = 2,186.88/x
  3. Step 3: Cross multiply
    8,426.88x = 12,640.27 × 2,186.88
  4. Step 4: Simplify right side
    8,426.88x = 27,642,753.66
  5. Step 5: Solve for x
    x = 27,642,753.66/8,426.88
  6. Step 6: Final answer
    x = 3,280.31

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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.