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Finding the Fourth Proportional to 5,712.48, 7,923.24 and 5,479.20

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Solution

The fourth proportional to 5,712.48, 7,923.24 and 5,479.20 is: 7,599.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,712.48 : 7,923.24 = 5,479.20 : x
  2. Step 2: Convert to fraction form
    5,712.48/7,923.24 = 5,479.20/x
  3. Step 3: Cross multiply
    5,712.48x = 7,923.24 × 5,479.20
  4. Step 4: Simplify right side
    5,712.48x = 43,413,016.61
  5. Step 5: Solve for x
    x = 43,413,016.61/5,712.48
  6. Step 6: Final answer
    x = 7,599.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.