Home / 3,618.88-4,989.12-2,291.92

Finding the Fourth Proportional to 3,618.88, 4,989.12 and 2,291.92

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Solution

The fourth proportional to 3,618.88, 4,989.12 and 2,291.92 is: 3,159.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.88 : 4,989.12 = 2,291.92 : x
  2. Step 2: Convert to fraction form
    3,618.88/4,989.12 = 2,291.92/x
  3. Step 3: Cross multiply
    3,618.88x = 4,989.12 × 2,291.92
  4. Step 4: Simplify right side
    3,618.88x = 11,434,663.91
  5. Step 5: Solve for x
    x = 11,434,663.91/3,618.88
  6. Step 6: Final answer
    x = 3,159.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.