Home / 5,138.55-7,711.52-2,218.95

Finding the Fourth Proportional to 5,138.55, 7,711.52 and 2,218.95

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Solution

The fourth proportional to 5,138.55, 7,711.52 and 2,218.95 is: 3,330.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.55 : 7,711.52 = 2,218.95 : x
  2. Step 2: Convert to fraction form
    5,138.55/7,711.52 = 2,218.95/x
  3. Step 3: Cross multiply
    5,138.55x = 7,711.52 × 2,218.95
  4. Step 4: Simplify right side
    5,138.55x = 17,111,466.21
  5. Step 5: Solve for x
    x = 17,111,466.21/5,138.55
  6. Step 6: Final answer
    x = 3,330.02

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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.