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Finding the Fourth Proportional to 8,531.88, 11,770.81 and 5,173.47

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Solution

The fourth proportional to 8,531.88, 11,770.81 and 5,173.47 is: 7,137.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,531.88 : 11,770.81 = 5,173.47 : x
  2. Step 2: Convert to fraction form
    8,531.88/11,770.81 = 5,173.47/x
  3. Step 3: Cross multiply
    8,531.88x = 11,770.81 × 5,173.47
  4. Step 4: Simplify right side
    8,531.88x = 60,895,912.20
  5. Step 5: Solve for x
    x = 60,895,912.20/8,531.88
  6. Step 6: Final answer
    x = 7,137.45

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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.