Home / 5,215.40-7,823.87-1,517.15

Finding the Fourth Proportional to 5,215.40, 7,823.87 and 1,517.15

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Solution

The fourth proportional to 5,215.40, 7,823.87 and 1,517.15 is: 2,275.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.40 : 7,823.87 = 1,517.15 : x
  2. Step 2: Convert to fraction form
    5,215.40/7,823.87 = 1,517.15/x
  3. Step 3: Cross multiply
    5,215.40x = 7,823.87 × 1,517.15
  4. Step 4: Simplify right side
    5,215.40x = 11,869,996.34
  5. Step 5: Solve for x
    x = 11,869,996.34/5,215.40
  6. Step 6: Final answer
    x = 2,275.95

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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.