Home / 5,478.85-8,219.58-1,781.11

Finding the Fourth Proportional to 5,478.85, 8,219.58 and 1,781.11

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Solution

The fourth proportional to 5,478.85, 8,219.58 and 1,781.11 is: 2,672.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478.85 : 8,219.58 = 1,781.11 : x
  2. Step 2: Convert to fraction form
    5,478.85/8,219.58 = 1,781.11/x
  3. Step 3: Cross multiply
    5,478.85x = 8,219.58 × 1,781.11
  4. Step 4: Simplify right side
    5,478.85x = 14,639,976.13
  5. Step 5: Solve for x
    x = 14,639,976.13/5,478.85
  6. Step 6: Final answer
    x = 2,672.09

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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.