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Finding the Fourth Proportional to 21,777.88, 30,049.50 and 12,826.84

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Solution

The fourth proportional to 21,777.88, 30,049.50 and 12,826.84 is: 17,698.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,777.88 : 30,049.50 = 12,826.84 : x
  2. Step 2: Convert to fraction form
    21,777.88/30,049.50 = 12,826.84/x
  3. Step 3: Cross multiply
    21,777.88x = 30,049.50 × 12,826.84
  4. Step 4: Simplify right side
    21,777.88x = 385,440,128.58
  5. Step 5: Solve for x
    x = 385,440,128.58/21,777.88
  6. Step 6: Final answer
    x = 17,698.70

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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.