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Finding the Fourth Proportional to 8,350.80, 11,531.90 and 5,371.80

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Solution

The fourth proportional to 8,350.80, 11,531.90 and 5,371.80 is: 7,418.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,350.80 : 11,531.90 = 5,371.80 : x
  2. Step 2: Convert to fraction form
    8,350.80/11,531.90 = 5,371.80/x
  3. Step 3: Cross multiply
    8,350.80x = 11,531.90 × 5,371.80
  4. Step 4: Simplify right side
    8,350.80x = 61,947,060.42
  5. Step 5: Solve for x
    x = 61,947,060.42/8,350.80
  6. Step 6: Final answer
    x = 7,418.10

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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.