Home / 3,938.50-5,434.96-2,145.99

Finding the Fourth Proportional to 3,938.50, 5,434.96 and 2,145.99

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Solution

The fourth proportional to 3,938.50, 5,434.96 and 2,145.99 is: 2,961.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.50 : 5,434.96 = 2,145.99 : x
  2. Step 2: Convert to fraction form
    3,938.50/5,434.96 = 2,145.99/x
  3. Step 3: Cross multiply
    3,938.50x = 5,434.96 × 2,145.99
  4. Step 4: Simplify right side
    3,938.50x = 11,663,331.91
  5. Step 5: Solve for x
    x = 11,663,331.91/3,938.50
  6. Step 6: Final answer
    x = 2,961.36

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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.