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Finding the Fourth Proportional to 8,938.55, 13,400.21 and 3,937.16

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Solution

The fourth proportional to 8,938.55, 13,400.21 and 3,937.16 is: 5,902.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,938.55 : 13,400.21 = 3,937.16 : x
  2. Step 2: Convert to fraction form
    8,938.55/13,400.21 = 3,937.16/x
  3. Step 3: Cross multiply
    8,938.55x = 13,400.21 × 3,937.16
  4. Step 4: Simplify right side
    8,938.55x = 52,758,770.80
  5. Step 5: Solve for x
    x = 52,758,770.80/8,938.55
  6. Step 6: Final answer
    x = 5,902.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.