Home / 36,138.86-49,862.15-20,821.66

Finding the Fourth Proportional to 36,138.86, 49,862.15 and 20,821.66

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Solution

The fourth proportional to 36,138.86, 49,862.15 and 20,821.66 is: 28,728.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,138.86 : 49,862.15 = 20,821.66 : x
  2. Step 2: Convert to fraction form
    36,138.86/49,862.15 = 20,821.66/x
  3. Step 3: Cross multiply
    36,138.86x = 49,862.15 × 20,821.66
  4. Step 4: Simplify right side
    36,138.86x = 1,038,212,380.75
  5. Step 5: Solve for x
    x = 1,038,212,380.75/36,138.86
  6. Step 6: Final answer
    x = 28,728.42

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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.