Home / 21,247.79-31,867.36-20,193.98

Finding the Fourth Proportional to 21,247.79, 31,867.36 and 20,193.98

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Solution

The fourth proportional to 21,247.79, 31,867.36 and 20,193.98 is: 30,286.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,247.79 : 31,867.36 = 20,193.98 : x
  2. Step 2: Convert to fraction form
    21,247.79/31,867.36 = 20,193.98/x
  3. Step 3: Cross multiply
    21,247.79x = 31,867.36 × 20,193.98
  4. Step 4: Simplify right side
    21,247.79x = 643,528,620.67
  5. Step 5: Solve for x
    x = 643,528,620.67/21,247.79
  6. Step 6: Final answer
    x = 30,286.86

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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.