Home / 5,138.20-7,708.30-1,851.56

Finding the Fourth Proportional to 5,138.20, 7,708.30 and 1,851.56

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Solution

The fourth proportional to 5,138.20, 7,708.30 and 1,851.56 is: 2,777.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.20 : 7,708.30 = 1,851.56 : x
  2. Step 2: Convert to fraction form
    5,138.20/7,708.30 = 1,851.56/x
  3. Step 3: Cross multiply
    5,138.20x = 7,708.30 × 1,851.56
  4. Step 4: Simplify right side
    5,138.20x = 14,272,379.95
  5. Step 5: Solve for x
    x = 14,272,379.95/5,138.20
  6. Step 6: Final answer
    x = 2,777.70

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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.