Home / 5,478.24-8,218.08-2,191.68

Finding the Fourth Proportional to 5,478.24, 8,218.08 and 2,191.68

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Solution

The fourth proportional to 5,478.24, 8,218.08 and 2,191.68 is: 3,287.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478.24 : 8,218.08 = 2,191.68 : x
  2. Step 2: Convert to fraction form
    5,478.24/8,218.08 = 2,191.68/x
  3. Step 3: Cross multiply
    5,478.24x = 8,218.08 × 2,191.68
  4. Step 4: Simplify right side
    5,478.24x = 18,011,401.57
  5. Step 5: Solve for x
    x = 18,011,401.57/5,478.24
  6. Step 6: Final answer
    x = 3,287.81

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1.5x scale

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.