Home / 9,177.44-12,660.80-5,638.56

Finding the Fourth Proportional to 9,177.44, 12,660.80 and 5,638.56

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Solution

The fourth proportional to 9,177.44, 12,660.80 and 5,638.56 is: 7,778.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,177.44 : 12,660.80 = 5,638.56 : x
  2. Step 2: Convert to fraction form
    9,177.44/12,660.80 = 5,638.56/x
  3. Step 3: Cross multiply
    9,177.44x = 12,660.80 × 5,638.56
  4. Step 4: Simplify right side
    9,177.44x = 71,388,680.45
  5. Step 5: Solve for x
    x = 71,388,680.45/9,177.44
  6. Step 6: Final answer
    x = 7,778.71

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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.