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Finding the Fourth Proportional to 8,666.87, 11,961.50 and 4,891.55

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Solution

The fourth proportional to 8,666.87, 11,961.50 and 4,891.55 is: 6,751.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.87 : 11,961.50 = 4,891.55 : x
  2. Step 2: Convert to fraction form
    8,666.87/11,961.50 = 4,891.55/x
  3. Step 3: Cross multiply
    8,666.87x = 11,961.50 × 4,891.55
  4. Step 4: Simplify right side
    8,666.87x = 58,510,191.06
  5. Step 5: Solve for x
    x = 58,510,191.06/8,666.87
  6. Step 6: Final answer
    x = 6,751.02

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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.