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Finding the Fourth Proportional to 8,938.35, 13,403.21 and 5,241.78

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Solution

The fourth proportional to 8,938.35, 13,403.21 and 5,241.78 is: 7,860.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,938.35 : 13,403.21 = 5,241.78 : x
  2. Step 2: Convert to fraction form
    8,938.35/13,403.21 = 5,241.78/x
  3. Step 3: Cross multiply
    8,938.35x = 13,403.21 × 5,241.78
  4. Step 4: Simplify right side
    8,938.35x = 70,256,651.90
  5. Step 5: Solve for x
    x = 70,256,651.90/8,938.35
  6. Step 6: Final answer
    x = 7,860.14

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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.