Home / 7,121.44-9,831.12-5,428.96

Finding the Fourth Proportional to 7,121.44, 9,831.12 and 5,428.96

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Solution

The fourth proportional to 7,121.44, 9,831.12 and 5,428.96 is: 7,494.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.44 : 9,831.12 = 5,428.96 : x
  2. Step 2: Convert to fraction form
    7,121.44/9,831.12 = 5,428.96/x
  3. Step 3: Cross multiply
    7,121.44x = 9,831.12 × 5,428.96
  4. Step 4: Simplify right side
    7,121.44x = 53,372,757.24
  5. Step 5: Solve for x
    x = 53,372,757.24/7,121.44
  6. Step 6: Final answer
    x = 7,494.66

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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.