Home / 5,421.80-8,127.11-2,645.04

Finding the Fourth Proportional to 5,421.80, 8,127.11 and 2,645.04

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Solution

The fourth proportional to 5,421.80, 8,127.11 and 2,645.04 is: 3,964.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.80 : 8,127.11 = 2,645.04 : x
  2. Step 2: Convert to fraction form
    5,421.80/8,127.11 = 2,645.04/x
  3. Step 3: Cross multiply
    5,421.80x = 8,127.11 × 2,645.04
  4. Step 4: Simplify right side
    5,421.80x = 21,496,531.03
  5. Step 5: Solve for x
    x = 21,496,531.03/5,421.80
  6. Step 6: Final answer
    x = 3,964.83

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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.