Home / 8,621.88-12,932.28-2,778.36

Finding the Fourth Proportional to 8,621.88, 12,932.28 and 2,778.36

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Solution

The fourth proportional to 8,621.88, 12,932.28 and 2,778.36 is: 4,167.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,621.88 : 12,932.28 = 2,778.36 : x
  2. Step 2: Convert to fraction form
    8,621.88/12,932.28 = 2,778.36/x
  3. Step 3: Cross multiply
    8,621.88x = 12,932.28 × 2,778.36
  4. Step 4: Simplify right side
    8,621.88x = 35,930,529.46
  5. Step 5: Solve for x
    x = 35,930,529.46/8,621.88
  6. Step 6: Final answer
    x = 4,167.37

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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.