Home / 21,199.91-31,806.78-10,664.49

Finding the Fourth Proportional to 21,199.91, 31,806.78 and 10,664.49

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Solution

The fourth proportional to 21,199.91, 31,806.78 and 10,664.49 is: 16,000.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,199.91 : 31,806.78 = 10,664.49 : x
  2. Step 2: Convert to fraction form
    21,199.91/31,806.78 = 10,664.49/x
  3. Step 3: Cross multiply
    21,199.91x = 31,806.78 × 10,664.49
  4. Step 4: Simplify right side
    21,199.91x = 339,203,191.43
  5. Step 5: Solve for x
    x = 339,203,191.43/21,199.91
  6. Step 6: Final answer
    x = 16,000.22

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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.