Home / 11,839.38-16,341.21-7,122.75

Finding the Fourth Proportional to 11,839.38, 16,341.21 and 7,122.75

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Solution

The fourth proportional to 11,839.38, 16,341.21 and 7,122.75 is: 9,831.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,839.38 : 16,341.21 = 7,122.75 : x
  2. Step 2: Convert to fraction form
    11,839.38/16,341.21 = 7,122.75/x
  3. Step 3: Cross multiply
    11,839.38x = 16,341.21 × 7,122.75
  4. Step 4: Simplify right side
    11,839.38x = 116,394,353.53
  5. Step 5: Solve for x
    x = 116,394,353.53/11,839.38
  6. Step 6: Final answer
    x = 9,831.12

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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.