Home / 8,781.87-13,172.78-4,100.31

Finding the Fourth Proportional to 8,781.87, 13,172.78 and 4,100.31

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Solution

The fourth proportional to 8,781.87, 13,172.78 and 4,100.31 is: 6,150.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.87 : 13,172.78 = 4,100.31 : x
  2. Step 2: Convert to fraction form
    8,781.87/13,172.78 = 4,100.31/x
  3. Step 3: Cross multiply
    8,781.87x = 13,172.78 × 4,100.31
  4. Step 4: Simplify right side
    8,781.87x = 54,012,481.56
  5. Step 5: Solve for x
    x = 54,012,481.56/8,781.87
  6. Step 6: Final answer
    x = 6,150.45

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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.