Home / 20,689.77-31,043.07-11,318.43

Finding the Fourth Proportional to 20,689.77, 31,043.07 and 11,318.43

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Solution

The fourth proportional to 20,689.77, 31,043.07 and 11,318.43 is: 16,982.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.77 : 31,043.07 = 11,318.43 : x
  2. Step 2: Convert to fraction form
    20,689.77/31,043.07 = 11,318.43/x
  3. Step 3: Cross multiply
    20,689.77x = 31,043.07 × 11,318.43
  4. Step 4: Simplify right side
    20,689.77x = 351,358,814.78
  5. Step 5: Solve for x
    x = 351,358,814.78/20,689.77
  6. Step 6: Final answer
    x = 16,982.25

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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.