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Finding the Fourth Proportional to 5,726.72, 8,591.36 and 1,831.36

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Solution

The fourth proportional to 5,726.72, 8,591.36 and 1,831.36 is: 2,747.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,726.72 : 8,591.36 = 1,831.36 : x
  2. Step 2: Convert to fraction form
    5,726.72/8,591.36 = 1,831.36/x
  3. Step 3: Cross multiply
    5,726.72x = 8,591.36 × 1,831.36
  4. Step 4: Simplify right side
    5,726.72x = 15,733,873.05
  5. Step 5: Solve for x
    x = 15,733,873.05/5,726.72
  6. Step 6: Final answer
    x = 2,747.45

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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.