Home / 6,615.78-9,128.61-4,227.90

Finding the Fourth Proportional to 6,615.78, 9,128.61 and 4,227.90

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Solution

The fourth proportional to 6,615.78, 9,128.61 and 4,227.90 is: 5,833.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,615.78 : 9,128.61 = 4,227.90 : x
  2. Step 2: Convert to fraction form
    6,615.78/9,128.61 = 4,227.90/x
  3. Step 3: Cross multiply
    6,615.78x = 9,128.61 × 4,227.90
  4. Step 4: Simplify right side
    6,615.78x = 38,594,850.22
  5. Step 5: Solve for x
    x = 38,594,850.22/6,615.78
  6. Step 6: Final answer
    x = 5,833.76

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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.