Home / 5,421.40-8,132.10-2,788.90

Finding the Fourth Proportional to 5,421.40, 8,132.10 and 2,788.90

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Solution

The fourth proportional to 5,421.40, 8,132.10 and 2,788.90 is: 4,183.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.40 : 8,132.10 = 2,788.90 : x
  2. Step 2: Convert to fraction form
    5,421.40/8,132.10 = 2,788.90/x
  3. Step 3: Cross multiply
    5,421.40x = 8,132.10 × 2,788.90
  4. Step 4: Simplify right side
    5,421.40x = 22,679,613.69
  5. Step 5: Solve for x
    x = 22,679,613.69/5,421.40
  6. Step 6: Final answer
    x = 4,183.35

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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.