Home / 12,108.17-18,149.30-8,634.89

Finding the Fourth Proportional to 12,108.17, 18,149.30 and 8,634.89

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Solution

The fourth proportional to 12,108.17, 18,149.30 and 8,634.89 is: 12,943.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,108.17 : 18,149.30 = 8,634.89 : x
  2. Step 2: Convert to fraction form
    12,108.17/18,149.30 = 8,634.89/x
  3. Step 3: Cross multiply
    12,108.17x = 18,149.30 × 8,634.89
  4. Step 4: Simplify right side
    12,108.17x = 156,717,209.08
  5. Step 5: Solve for x
    x = 156,717,209.08/12,108.17
  6. Step 6: Final answer
    x = 12,943.10

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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.