Home / 21,738.76-30,000.90-12,179.54

Finding the Fourth Proportional to 21,738.76, 30,000.90 and 12,179.54

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Solution

The fourth proportional to 21,738.76, 30,000.90 and 12,179.54 is: 16,808.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,738.76 : 30,000.90 = 12,179.54 : x
  2. Step 2: Convert to fraction form
    21,738.76/30,000.90 = 12,179.54/x
  3. Step 3: Cross multiply
    21,738.76x = 30,000.90 × 12,179.54
  4. Step 4: Simplify right side
    21,738.76x = 365,397,161.59
  5. Step 5: Solve for x
    x = 365,397,161.59/21,738.76
  6. Step 6: Final answer
    x = 16,808.56

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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.