Home / 5,105.45-7,044.27-3,115.28

Finding the Fourth Proportional to 5,105.45, 7,044.27 and 3,115.28

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Solution

The fourth proportional to 5,105.45, 7,044.27 and 3,115.28 is: 4,298.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,105.45 : 7,044.27 = 3,115.28 : x
  2. Step 2: Convert to fraction form
    5,105.45/7,044.27 = 3,115.28/x
  3. Step 3: Cross multiply
    5,105.45x = 7,044.27 × 3,115.28
  4. Step 4: Simplify right side
    5,105.45x = 21,944,838.22
  5. Step 5: Solve for x
    x = 21,944,838.22/5,105.45
  6. Step 6: Final answer
    x = 4,298.32

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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.