Home / 7,961.07-10,991.25-5,129.85

Finding the Fourth Proportional to 7,961.07, 10,991.25 and 5,129.85

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Solution

The fourth proportional to 7,961.07, 10,991.25 and 5,129.85 is: 7,082.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,961.07 : 10,991.25 = 5,129.85 : x
  2. Step 2: Convert to fraction form
    7,961.07/10,991.25 = 5,129.85/x
  3. Step 3: Cross multiply
    7,961.07x = 10,991.25 × 5,129.85
  4. Step 4: Simplify right side
    7,961.07x = 56,383,463.81
  5. Step 5: Solve for x
    x = 56,383,463.81/7,961.07
  6. Step 6: Final answer
    x = 7,082.40

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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.