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Finding the Fourth Proportional to 7,672.20, 10,600.80 and 5,918.88

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Solution

The fourth proportional to 7,672.20, 10,600.80 and 5,918.88 is: 8,178.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,672.20 : 10,600.80 = 5,918.88 : x
  2. Step 2: Convert to fraction form
    7,672.20/10,600.80 = 5,918.88/x
  3. Step 3: Cross multiply
    7,672.20x = 10,600.80 × 5,918.88
  4. Step 4: Simplify right side
    7,672.20x = 62,744,863.10
  5. Step 5: Solve for x
    x = 62,744,863.10/7,672.20
  6. Step 6: Final answer
    x = 8,178.21

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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.