Home / 3,934.78-5,423.70-2,987.49

Finding the Fourth Proportional to 3,934.78, 5,423.70 and 2,987.49

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Solution

The fourth proportional to 3,934.78, 5,423.70 and 2,987.49 is: 4,117.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934.78 : 5,423.70 = 2,987.49 : x
  2. Step 2: Convert to fraction form
    3,934.78/5,423.70 = 2,987.49/x
  3. Step 3: Cross multiply
    3,934.78x = 5,423.70 × 2,987.49
  4. Step 4: Simplify right side
    3,934.78x = 16,203,249.51
  5. Step 5: Solve for x
    x = 16,203,249.51/3,934.78
  6. Step 6: Final answer
    x = 4,117.96

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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.