Home / 5,121.42-7,065.96-3,131.52

Finding the Fourth Proportional to 5,121.42, 7,065.96 and 3,131.52

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Solution

The fourth proportional to 5,121.42, 7,065.96 and 3,131.52 is: 4,320.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.42 : 7,065.96 = 3,131.52 : x
  2. Step 2: Convert to fraction form
    5,121.42/7,065.96 = 3,131.52/x
  3. Step 3: Cross multiply
    5,121.42x = 7,065.96 × 3,131.52
  4. Step 4: Simplify right side
    5,121.42x = 22,127,195.06
  5. Step 5: Solve for x
    x = 22,127,195.06/5,121.42
  6. Step 6: Final answer
    x = 4,320.52

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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.