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Finding the Fourth Proportional to 7,136.88, 9,860.80 and 6,343.88

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Solution

The fourth proportional to 7,136.88, 9,860.80 and 6,343.88 is: 8,765.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,136.88 : 9,860.80 = 6,343.88 : x
  2. Step 2: Convert to fraction form
    7,136.88/9,860.80 = 6,343.88/x
  3. Step 3: Cross multiply
    7,136.88x = 9,860.80 × 6,343.88
  4. Step 4: Simplify right side
    7,136.88x = 62,555,731.90
  5. Step 5: Solve for x
    x = 62,555,731.90/7,136.88
  6. Step 6: Final answer
    x = 8,765.14

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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.