Home / 5,311.17-7,960.19-2,189.21

Finding the Fourth Proportional to 5,311.17, 7,960.19 and 2,189.21

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Solution

The fourth proportional to 5,311.17, 7,960.19 and 2,189.21 is: 3,281.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,311.17 : 7,960.19 = 2,189.21 : x
  2. Step 2: Convert to fraction form
    5,311.17/7,960.19 = 2,189.21/x
  3. Step 3: Cross multiply
    5,311.17x = 7,960.19 × 2,189.21
  4. Step 4: Simplify right side
    5,311.17x = 17,426,476.80
  5. Step 5: Solve for x
    x = 17,426,476.80/5,311.17
  6. Step 6: Final answer
    x = 3,281.10

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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.