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Finding the Fourth Proportional to 6,912.80, 10,367.07 and 1,981.11

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Solution

The fourth proportional to 6,912.80, 10,367.07 and 1,981.11 is: 2,971.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,912.80 : 10,367.07 = 1,981.11 : x
  2. Step 2: Convert to fraction form
    6,912.80/10,367.07 = 1,981.11/x
  3. Step 3: Cross multiply
    6,912.80x = 10,367.07 × 1,981.11
  4. Step 4: Simplify right side
    6,912.80x = 20,538,306.05
  5. Step 5: Solve for x
    x = 20,538,306.05/6,912.80
  6. Step 6: Final answer
    x = 2,971.06

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Similar ratio
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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.