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Finding the Fourth Proportional to 8,612.99, 12,918.17 and 4,108.91

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Solution

The fourth proportional to 8,612.99, 12,918.17 and 4,108.91 is: 6,162.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.99 : 12,918.17 = 4,108.91 : x
  2. Step 2: Convert to fraction form
    8,612.99/12,918.17 = 4,108.91/x
  3. Step 3: Cross multiply
    8,612.99x = 12,918.17 × 4,108.91
  4. Step 4: Simplify right side
    8,612.99x = 53,079,543.58
  5. Step 5: Solve for x
    x = 53,079,543.58/8,612.99
  6. Step 6: Final answer
    x = 6,162.73

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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.