Home / 5,425.28-8,137.86-1,321.28

Finding the Fourth Proportional to 5,425.28, 8,137.86 and 1,321.28

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Solution

The fourth proportional to 5,425.28, 8,137.86 and 1,321.28 is: 1,981.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,425.28 : 8,137.86 = 1,321.28 : x
  2. Step 2: Convert to fraction form
    5,425.28/8,137.86 = 1,321.28/x
  3. Step 3: Cross multiply
    5,425.28x = 8,137.86 × 1,321.28
  4. Step 4: Simplify right side
    5,425.28x = 10,752,391.66
  5. Step 5: Solve for x
    x = 10,752,391.66/5,425.28
  6. Step 6: Final answer
    x = 1,981.91

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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.