Home / 5,421.12-8,132.28-2,133.78

Finding the Fourth Proportional to 5,421.12, 8,132.28 and 2,133.78

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Solution

The fourth proportional to 5,421.12, 8,132.28 and 2,133.78 is: 3,200.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.12 : 8,132.28 = 2,133.78 : x
  2. Step 2: Convert to fraction form
    5,421.12/8,132.28 = 2,133.78/x
  3. Step 3: Cross multiply
    5,421.12x = 8,132.28 × 2,133.78
  4. Step 4: Simplify right side
    5,421.12x = 17,352,496.42
  5. Step 5: Solve for x
    x = 17,352,496.42/5,421.12
  6. Step 6: Final answer
    x = 3,200.91

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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.