Home / 5,281.14-7,921.86-1,385.58

Finding the Fourth Proportional to 5,281.14, 7,921.86 and 1,385.58

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Solution

The fourth proportional to 5,281.14, 7,921.86 and 1,385.58 is: 2,078.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,281.14 : 7,921.86 = 1,385.58 : x
  2. Step 2: Convert to fraction form
    5,281.14/7,921.86 = 1,385.58/x
  3. Step 3: Cross multiply
    5,281.14x = 7,921.86 × 1,385.58
  4. Step 4: Simplify right side
    5,281.14x = 10,976,370.78
  5. Step 5: Solve for x
    x = 10,976,370.78/5,281.14
  6. Step 6: Final answer
    x = 2,078.41

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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.