Home / 5,421.68-8,149.72-5,191.28

Finding the Fourth Proportional to 5,421.68, 8,149.72 and 5,191.28

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Solution

The fourth proportional to 5,421.68, 8,149.72 and 5,191.28 is: 7,803.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.68 : 8,149.72 = 5,191.28 : x
  2. Step 2: Convert to fraction form
    5,421.68/8,149.72 = 5,191.28/x
  3. Step 3: Cross multiply
    5,421.68x = 8,149.72 × 5,191.28
  4. Step 4: Simplify right side
    5,421.68x = 42,307,478.44
  5. Step 5: Solve for x
    x = 42,307,478.44/5,421.68
  6. Step 6: Final answer
    x = 7,803.39

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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.