Home / 5,120.28-7,681.59-2,199.42

Finding the Fourth Proportional to 5,120.28, 7,681.59 and 2,199.42

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Solution

The fourth proportional to 5,120.28, 7,681.59 and 2,199.42 is: 3,299.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.28 : 7,681.59 = 2,199.42 : x
  2. Step 2: Convert to fraction form
    5,120.28/7,681.59 = 2,199.42/x
  3. Step 3: Cross multiply
    5,120.28x = 7,681.59 × 2,199.42
  4. Step 4: Simplify right side
    5,120.28x = 16,895,042.68
  5. Step 5: Solve for x
    x = 16,895,042.68/5,120.28
  6. Step 6: Final answer
    x = 3,299.63

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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.