Home / 20,705.82-31,069.71-15,806.94

Finding the Fourth Proportional to 20,705.82, 31,069.71 and 15,806.94

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Solution

The fourth proportional to 20,705.82, 31,069.71 and 15,806.94 is: 23,718.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.82 : 31,069.71 = 15,806.94 : x
  2. Step 2: Convert to fraction form
    20,705.82/31,069.71 = 15,806.94/x
  3. Step 3: Cross multiply
    20,705.82x = 31,069.71 × 15,806.94
  4. Step 4: Simplify right side
    20,705.82x = 491,117,041.79
  5. Step 5: Solve for x
    x = 491,117,041.79/20,705.82
  6. Step 6: Final answer
    x = 23,718.79

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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.