Home / 3,989.52-5,499.36-2,808

Finding the Fourth Proportional to 3,989.52, 5,499.36 and 2,808

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Solution

The fourth proportional to 3,989.52, 5,499.36 and 2,808 is: 3,870.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.52 : 5,499.36 = 2,808 : x
  2. Step 2: Convert to fraction form
    3,989.52/5,499.36 = 2,808/x
  3. Step 3: Cross multiply
    3,989.52x = 5,499.36 × 2,808
  4. Step 4: Simplify right side
    3,989.52x = 15,442,202.88
  5. Step 5: Solve for x
    x = 15,442,202.88/3,989.52
  6. Step 6: Final answer
    x = 3,870.69

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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.