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Finding the Fourth Proportional to 7,131.80, 10,697.70 and 3,851.30

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Solution

The fourth proportional to 7,131.80, 10,697.70 and 3,851.30 is: 5,776.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131.80 : 10,697.70 = 3,851.30 : x
  2. Step 2: Convert to fraction form
    7,131.80/10,697.70 = 3,851.30/x
  3. Step 3: Cross multiply
    7,131.80x = 10,697.70 × 3,851.30
  4. Step 4: Simplify right side
    7,131.80x = 41,200,052.01
  5. Step 5: Solve for x
    x = 41,200,052.01/7,131.80
  6. Step 6: Final answer
    x = 5,776.95

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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.