Home / 8,789.75-12,127.92-5,387.48

Finding the Fourth Proportional to 8,789.75, 12,127.92 and 5,387.48

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Solution

The fourth proportional to 8,789.75, 12,127.92 and 5,387.48 is: 7,433.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,789.75 : 12,127.92 = 5,387.48 : x
  2. Step 2: Convert to fraction form
    8,789.75/12,127.92 = 5,387.48/x
  3. Step 3: Cross multiply
    8,789.75x = 12,127.92 × 5,387.48
  4. Step 4: Simplify right side
    8,789.75x = 65,338,926.44
  5. Step 5: Solve for x
    x = 65,338,926.44/8,789.75
  6. Step 6: Final answer
    x = 7,433.54

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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.