Home / 8,781.56-12,114.31-5,195.54

Finding the Fourth Proportional to 8,781.56, 12,114.31 and 5,195.54

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Solution

The fourth proportional to 8,781.56, 12,114.31 and 5,195.54 is: 7,167.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.56 : 12,114.31 = 5,195.54 : x
  2. Step 2: Convert to fraction form
    8,781.56/12,114.31 = 5,195.54/x
  3. Step 3: Cross multiply
    8,781.56x = 12,114.31 × 5,195.54
  4. Step 4: Simplify right side
    8,781.56x = 62,940,409.22
  5. Step 5: Solve for x
    x = 62,940,409.22/8,781.56
  6. Step 6: Final answer
    x = 7,167.33

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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.