Home / 5,129.52-7,077.04-2,891.12

Finding the Fourth Proportional to 5,129.52, 7,077.04 and 2,891.12

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Solution

The fourth proportional to 5,129.52, 7,077.04 and 2,891.12 is: 3,988.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.52 : 7,077.04 = 2,891.12 : x
  2. Step 2: Convert to fraction form
    5,129.52/7,077.04 = 2,891.12/x
  3. Step 3: Cross multiply
    5,129.52x = 7,077.04 × 2,891.12
  4. Step 4: Simplify right side
    5,129.52x = 20,460,571.88
  5. Step 5: Solve for x
    x = 20,460,571.88/5,129.52
  6. Step 6: Final answer
    x = 3,988.79

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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.