Home / 7,176.27-9,902.90-3,989.78

Finding the Fourth Proportional to 7,176.27, 9,902.90 and 3,989.78

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Solution

The fourth proportional to 7,176.27, 9,902.90 and 3,989.78 is: 5,505.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,176.27 : 9,902.90 = 3,989.78 : x
  2. Step 2: Convert to fraction form
    7,176.27/9,902.90 = 3,989.78/x
  3. Step 3: Cross multiply
    7,176.27x = 9,902.90 × 3,989.78
  4. Step 4: Simplify right side
    7,176.27x = 39,510,392.36
  5. Step 5: Solve for x
    x = 39,510,392.36/7,176.27
  6. Step 6: Final answer
    x = 5,505.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.