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Finding the Fourth Proportional to 8,666.59, 12,998.44 and 3,118.90

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Solution

The fourth proportional to 8,666.59, 12,998.44 and 3,118.90 is: 4,677.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.59 : 12,998.44 = 3,118.90 : x
  2. Step 2: Convert to fraction form
    8,666.59/12,998.44 = 3,118.90/x
  3. Step 3: Cross multiply
    8,666.59x = 12,998.44 × 3,118.90
  4. Step 4: Simplify right side
    8,666.59x = 40,540,834.52
  5. Step 5: Solve for x
    x = 40,540,834.52/8,666.59
  6. Step 6: Final answer
    x = 4,677.83

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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.