Home / 11,838.38-16,339.83-7,121.75

Finding the Fourth Proportional to 11,838.38, 16,339.83 and 7,121.75

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Solution

The fourth proportional to 11,838.38, 16,339.83 and 7,121.75 is: 9,829.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,838.38 : 16,339.83 = 7,121.75 : x
  2. Step 2: Convert to fraction form
    11,838.38/16,339.83 = 7,121.75/x
  3. Step 3: Cross multiply
    11,838.38x = 16,339.83 × 7,121.75
  4. Step 4: Simplify right side
    11,838.38x = 116,368,184.30
  5. Step 5: Solve for x
    x = 116,368,184.30/11,838.38
  6. Step 6: Final answer
    x = 9,829.74

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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.