Home / 39,920.85-55,102.28-27,987.12

Finding the Fourth Proportional to 39,920.85, 55,102.28 and 27,987.12

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Solution

The fourth proportional to 39,920.85, 55,102.28 and 27,987.12 is: 38,630.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,920.85 : 55,102.28 = 27,987.12 : x
  2. Step 2: Convert to fraction form
    39,920.85/55,102.28 = 27,987.12/x
  3. Step 3: Cross multiply
    39,920.85x = 55,102.28 × 27,987.12
  4. Step 4: Simplify right side
    39,920.85x = 1,542,153,982.70
  5. Step 5: Solve for x
    x = 1,542,153,982.70/39,920.85
  6. Step 6: Final answer
    x = 38,630.29

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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.