Home / 7,715.28-11,571.11-2,169.15

Finding the Fourth Proportional to 7,715.28, 11,571.11 and 2,169.15

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Solution

The fourth proportional to 7,715.28, 11,571.11 and 2,169.15 is: 3,253.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.28 : 11,571.11 = 2,169.15 : x
  2. Step 2: Convert to fraction form
    7,715.28/11,571.11 = 2,169.15/x
  3. Step 3: Cross multiply
    7,715.28x = 11,571.11 × 2,169.15
  4. Step 4: Simplify right side
    7,715.28x = 25,099,473.26
  5. Step 5: Solve for x
    x = 25,099,473.26/7,715.28
  6. Step 6: Final answer
    x = 3,253.22

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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.