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Finding the Fourth Proportional to 6,343.76, 8,756.80 and 5,679.44

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Solution

The fourth proportional to 6,343.76, 8,756.80 and 5,679.44 is: 7,839.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,343.76 : 8,756.80 = 5,679.44 : x
  2. Step 2: Convert to fraction form
    6,343.76/8,756.80 = 5,679.44/x
  3. Step 3: Cross multiply
    6,343.76x = 8,756.80 × 5,679.44
  4. Step 4: Simplify right side
    6,343.76x = 49,733,720.19
  5. Step 5: Solve for x
    x = 49,733,720.19/6,343.76
  6. Step 6: Final answer
    x = 7,839.79

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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.