Home / 2,939.88-4,432.08-2,781.12

Finding the Fourth Proportional to 2,939.88, 4,432.08 and 2,781.12

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Solution

The fourth proportional to 2,939.88, 4,432.08 and 2,781.12 is: 4,192.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.88 : 4,432.08 = 2,781.12 : x
  2. Step 2: Convert to fraction form
    2,939.88/4,432.08 = 2,781.12/x
  3. Step 3: Cross multiply
    2,939.88x = 4,432.08 × 2,781.12
  4. Step 4: Simplify right side
    2,939.88x = 12,326,146.33
  5. Step 5: Solve for x
    x = 12,326,146.33/2,939.88
  6. Step 6: Final answer
    x = 4,192.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.