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Finding the Fourth Proportional to 7,191.11, 9,861.77 and 6,891.75

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Solution

The fourth proportional to 7,191.11, 9,861.77 and 6,891.75 is: 9,451.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,191.11 : 9,861.77 = 6,891.75 : x
  2. Step 2: Convert to fraction form
    7,191.11/9,861.77 = 6,891.75/x
  3. Step 3: Cross multiply
    7,191.11x = 9,861.77 × 6,891.75
  4. Step 4: Simplify right side
    7,191.11x = 67,964,870.63
  5. Step 5: Solve for x
    x = 67,964,870.63/7,191.11
  6. Step 6: Final answer
    x = 9,451.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.