Home / 7,715.55-11,573.18-2,168.78

Finding the Fourth Proportional to 7,715.55, 11,573.18 and 2,168.78

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Solution

The fourth proportional to 7,715.55, 11,573.18 and 2,168.78 is: 3,253.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.55 : 11,573.18 = 2,168.78 : x
  2. Step 2: Convert to fraction form
    7,715.55/11,573.18 = 2,168.78/x
  3. Step 3: Cross multiply
    7,715.55x = 11,573.18 × 2,168.78
  4. Step 4: Simplify right side
    7,715.55x = 25,099,620.74
  5. Step 5: Solve for x
    x = 25,099,620.74/7,715.55
  6. Step 6: Final answer
    x = 3,253.12

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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.