Home / 5,478.68-8,215.86-2,191.16

Finding the Fourth Proportional to 5,478.68, 8,215.86 and 2,191.16

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Solution

The fourth proportional to 5,478.68, 8,215.86 and 2,191.16 is: 3,285.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478.68 : 8,215.86 = 2,191.16 : x
  2. Step 2: Convert to fraction form
    5,478.68/8,215.86 = 2,191.16/x
  3. Step 3: Cross multiply
    5,478.68x = 8,215.86 × 2,191.16
  4. Step 4: Simplify right side
    5,478.68x = 18,002,263.80
  5. Step 5: Solve for x
    x = 18,002,263.80/5,478.68
  6. Step 6: Final answer
    x = 3,285.88

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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.