Home / 7,121.05-9,831.68-6,373.72

Finding the Fourth Proportional to 7,121.05, 9,831.68 and 6,373.72

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Solution

The fourth proportional to 7,121.05, 9,831.68 and 6,373.72 is: 8,799.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.05 : 9,831.68 = 6,373.72 : x
  2. Step 2: Convert to fraction form
    7,121.05/9,831.68 = 6,373.72/x
  3. Step 3: Cross multiply
    7,121.05x = 9,831.68 × 6,373.72
  4. Step 4: Simplify right side
    7,121.05x = 62,664,375.45
  5. Step 5: Solve for x
    x = 62,664,375.45/7,121.05
  6. Step 6: Final answer
    x = 8,799.88

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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.