Home / 5,115.38-7,059.77-2,991.56

Finding the Fourth Proportional to 5,115.38, 7,059.77 and 2,991.56

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Solution

The fourth proportional to 5,115.38, 7,059.77 and 2,991.56 is: 4,128.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.38 : 7,059.77 = 2,991.56 : x
  2. Step 2: Convert to fraction form
    5,115.38/7,059.77 = 2,991.56/x
  3. Step 3: Cross multiply
    5,115.38x = 7,059.77 × 2,991.56
  4. Step 4: Simplify right side
    5,115.38x = 21,119,675.28
  5. Step 5: Solve for x
    x = 21,119,675.28/5,115.38
  6. Step 6: Final answer
    x = 4,128.67

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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.