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Finding the Fourth Proportional to 5,120.48, 7,687.92 and 5,032.88

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Solution

The fourth proportional to 5,120.48, 7,687.92 and 5,032.88 is: 7,556.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.48 : 7,687.92 = 5,032.88 : x
  2. Step 2: Convert to fraction form
    5,120.48/7,687.92 = 5,032.88/x
  3. Step 3: Cross multiply
    5,120.48x = 7,687.92 × 5,032.88
  4. Step 4: Simplify right side
    5,120.48x = 38,692,378.81
  5. Step 5: Solve for x
    x = 38,692,378.81/5,120.48
  6. Step 6: Final answer
    x = 7,556.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.