Home / 21,168.28-31,755.20-7,839.44

Finding the Fourth Proportional to 21,168.28, 31,755.20 and 7,839.44

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Solution

The fourth proportional to 21,168.28, 31,755.20 and 7,839.44 is: 11,760.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,168.28 : 31,755.20 = 7,839.44 : x
  2. Step 2: Convert to fraction form
    21,168.28/31,755.20 = 7,839.44/x
  3. Step 3: Cross multiply
    21,168.28x = 31,755.20 × 7,839.44
  4. Step 4: Simplify right side
    21,168.28x = 248,942,985.09
  5. Step 5: Solve for x
    x = 248,942,985.09/21,168.28
  6. Step 6: Final answer
    x = 11,760.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.