Home / 5,138.25-7,089.17-3,147.81

Finding the Fourth Proportional to 5,138.25, 7,089.17 and 3,147.81

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Solution

The fourth proportional to 5,138.25, 7,089.17 and 3,147.81 is: 4,342.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.25 : 7,089.17 = 3,147.81 : x
  2. Step 2: Convert to fraction form
    5,138.25/7,089.17 = 3,147.81/x
  3. Step 3: Cross multiply
    5,138.25x = 7,089.17 × 3,147.81
  4. Step 4: Simplify right side
    5,138.25x = 22,315,344.48
  5. Step 5: Solve for x
    x = 22,315,344.48/5,138.25
  6. Step 6: Final answer
    x = 4,342.99

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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.