Home / 3,138.99-4,324.68-2,428.39

Finding the Fourth Proportional to 3,138.99, 4,324.68 and 2,428.39

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Solution

The fourth proportional to 3,138.99, 4,324.68 and 2,428.39 is: 3,345.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.99 : 4,324.68 = 2,428.39 : x
  2. Step 2: Convert to fraction form
    3,138.99/4,324.68 = 2,428.39/x
  3. Step 3: Cross multiply
    3,138.99x = 4,324.68 × 2,428.39
  4. Step 4: Simplify right side
    3,138.99x = 10,502,015.74
  5. Step 5: Solve for x
    x = 10,502,015.74/3,138.99
  6. Step 6: Final answer
    x = 3,345.66

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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.