Home / 5,129.32-7,077.92-2,891.14

Finding the Fourth Proportional to 5,129.32, 7,077.92 and 2,891.14

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Solution

The fourth proportional to 5,129.32, 7,077.92 and 2,891.14 is: 3,989.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.32 : 7,077.92 = 2,891.14 : x
  2. Step 2: Convert to fraction form
    5,129.32/7,077.92 = 2,891.14/x
  3. Step 3: Cross multiply
    5,129.32x = 7,077.92 × 2,891.14
  4. Step 4: Simplify right side
    5,129.32x = 20,463,257.63
  5. Step 5: Solve for x
    x = 20,463,257.63/5,129.32
  6. Step 6: Final answer
    x = 3,989.47

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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.