Home / 21,777.66-30,042.09-12,824.73

Finding the Fourth Proportional to 21,777.66, 30,042.09 and 12,824.73

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Solution

The fourth proportional to 21,777.66, 30,042.09 and 12,824.73 is: 17,691.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,777.66 : 30,042.09 = 12,824.73 : x
  2. Step 2: Convert to fraction form
    21,777.66/30,042.09 = 12,824.73/x
  3. Step 3: Cross multiply
    21,777.66x = 30,042.09 × 12,824.73
  4. Step 4: Simplify right side
    21,777.66x = 385,281,692.89
  5. Step 5: Solve for x
    x = 385,281,692.89/21,777.66
  6. Step 6: Final answer
    x = 17,691.60

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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.