Home / 5,191.20-7,790.76-3,808.20

Finding the Fourth Proportional to 5,191.20, 7,790.76 and 3,808.20

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Solution

The fourth proportional to 5,191.20, 7,790.76 and 3,808.20 is: 5,715.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,191.20 : 7,790.76 = 3,808.20 : x
  2. Step 2: Convert to fraction form
    5,191.20/7,790.76 = 3,808.20/x
  3. Step 3: Cross multiply
    5,191.20x = 7,790.76 × 3,808.20
  4. Step 4: Simplify right side
    5,191.20x = 29,668,772.23
  5. Step 5: Solve for x
    x = 29,668,772.23/5,191.20
  6. Step 6: Final answer
    x = 5,715.21

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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.