Home / 3,909.12-5,858.58-2,981.28

Finding the Fourth Proportional to 3,909.12, 5,858.58 and 2,981.28

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Solution

The fourth proportional to 3,909.12, 5,858.58 and 2,981.28 is: 4,468.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.12 : 5,858.58 = 2,981.28 : x
  2. Step 2: Convert to fraction form
    3,909.12/5,858.58 = 2,981.28/x
  3. Step 3: Cross multiply
    3,909.12x = 5,858.58 × 2,981.28
  4. Step 4: Simplify right side
    3,909.12x = 17,466,067.38
  5. Step 5: Solve for x
    x = 17,466,067.38/3,909.12
  6. Step 6: Final answer
    x = 4,468.03

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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.