Home / 11,961.05-16,508.53-7,920.75

Finding the Fourth Proportional to 11,961.05, 16,508.53 and 7,920.75

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Solution

The fourth proportional to 11,961.05, 16,508.53 and 7,920.75 is: 10,932.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,961.05 : 16,508.53 = 7,920.75 : x
  2. Step 2: Convert to fraction form
    11,961.05/16,508.53 = 7,920.75/x
  3. Step 3: Cross multiply
    11,961.05x = 16,508.53 × 7,920.75
  4. Step 4: Simplify right side
    11,961.05x = 130,760,010.81
  5. Step 5: Solve for x
    x = 130,760,010.81/11,961.05
  6. Step 6: Final answer
    x = 10,932.16

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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.