Home / 5,179.76-7,148.10-2,821.92

Finding the Fourth Proportional to 5,179.76, 7,148.10 and 2,821.92

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Solution

The fourth proportional to 5,179.76, 7,148.10 and 2,821.92 is: 3,894.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.76 : 7,148.10 = 2,821.92 : x
  2. Step 2: Convert to fraction form
    5,179.76/7,148.10 = 2,821.92/x
  3. Step 3: Cross multiply
    5,179.76x = 7,148.10 × 2,821.92
  4. Step 4: Simplify right side
    5,179.76x = 20,171,366.35
  5. Step 5: Solve for x
    x = 20,171,366.35/5,179.76
  6. Step 6: Final answer
    x = 3,894.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.