Home / 5,128.38-7,075.62-3,138.48

Finding the Fourth Proportional to 5,128.38, 7,075.62 and 3,138.48

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Solution

The fourth proportional to 5,128.38, 7,075.62 and 3,138.48 is: 4,330.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.38 : 7,075.62 = 3,138.48 : x
  2. Step 2: Convert to fraction form
    5,128.38/7,075.62 = 3,138.48/x
  3. Step 3: Cross multiply
    5,128.38x = 7,075.62 × 3,138.48
  4. Step 4: Simplify right side
    5,128.38x = 22,206,691.86
  5. Step 5: Solve for x
    x = 22,206,691.86/5,128.38
  6. Step 6: Final answer
    x = 4,330.16

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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.