Home / 10,517.48-15,778.52-3,121.50

Finding the Fourth Proportional to 10,517.48, 15,778.52 and 3,121.50

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Solution

The fourth proportional to 10,517.48, 15,778.52 and 3,121.50 is: 4,682.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,517.48 : 15,778.52 = 3,121.50 : x
  2. Step 2: Convert to fraction form
    10,517.48/15,778.52 = 3,121.50/x
  3. Step 3: Cross multiply
    10,517.48x = 15,778.52 × 3,121.50
  4. Step 4: Simplify right side
    10,517.48x = 49,252,634.57
  5. Step 5: Solve for x
    x = 49,252,634.57/10,517.48
  6. Step 6: Final answer
    x = 4,682.93

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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.