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Finding the Fourth Proportional to 7,215.92, 9,963.60 and 5,648.48

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Solution

The fourth proportional to 7,215.92, 9,963.60 and 5,648.48 is: 7,799.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,215.92 : 9,963.60 = 5,648.48 : x
  2. Step 2: Convert to fraction form
    7,215.92/9,963.60 = 5,648.48/x
  3. Step 3: Cross multiply
    7,215.92x = 9,963.60 × 5,648.48
  4. Step 4: Simplify right side
    7,215.92x = 56,279,195.33
  5. Step 5: Solve for x
    x = 56,279,195.33/7,215.92
  6. Step 6: Final answer
    x = 7,799.31

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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.