Home / 20,718.39-31,028.09-11,344.35

Finding the Fourth Proportional to 20,718.39, 31,028.09 and 11,344.35

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Solution

The fourth proportional to 20,718.39, 31,028.09 and 11,344.35 is: 16,989.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.39 : 31,028.09 = 11,344.35 : x
  2. Step 2: Convert to fraction form
    20,718.39/31,028.09 = 11,344.35/x
  3. Step 3: Cross multiply
    20,718.39x = 31,028.09 × 11,344.35
  4. Step 4: Simplify right side
    20,718.39x = 351,993,456.07
  5. Step 5: Solve for x
    x = 351,993,456.07/20,718.39
  6. Step 6: Final answer
    x = 16,989.42

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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.