Home / 3,138.36-4,328.96-2,391

Finding the Fourth Proportional to 3,138.36, 4,328.96 and 2,391

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Solution

The fourth proportional to 3,138.36, 4,328.96 and 2,391 is: 3,298.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.36 : 4,328.96 = 2,391 : x
  2. Step 2: Convert to fraction form
    3,138.36/4,328.96 = 2,391/x
  3. Step 3: Cross multiply
    3,138.36x = 4,328.96 × 2,391
  4. Step 4: Simplify right side
    3,138.36x = 10,350,543.36
  5. Step 5: Solve for x
    x = 10,350,543.36/3,138.36
  6. Step 6: Final answer
    x = 3,298.07

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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.