Home / 5,129.16-7,079.27-2,891.06

Finding the Fourth Proportional to 5,129.16, 7,079.27 and 2,891.06

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Solution

The fourth proportional to 5,129.16, 7,079.27 and 2,891.06 is: 3,990.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.16 : 7,079.27 = 2,891.06 : x
  2. Step 2: Convert to fraction form
    5,129.16/7,079.27 = 2,891.06/x
  3. Step 3: Cross multiply
    5,129.16x = 7,079.27 × 2,891.06
  4. Step 4: Simplify right side
    5,129.16x = 20,466,571.02
  5. Step 5: Solve for x
    x = 20,466,571.02/5,129.16
  6. Step 6: Final answer
    x = 3,990.24

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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.