Home / 20,922.14-31,388.52-9,685.58

Finding the Fourth Proportional to 20,922.14, 31,388.52 and 9,685.58

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Solution

The fourth proportional to 20,922.14, 31,388.52 and 9,685.58 is: 14,530.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.14 : 31,388.52 = 9,685.58 : x
  2. Step 2: Convert to fraction form
    20,922.14/31,388.52 = 9,685.58/x
  3. Step 3: Cross multiply
    20,922.14x = 31,388.52 × 9,685.58
  4. Step 4: Simplify right side
    20,922.14x = 304,015,982.31
  5. Step 5: Solve for x
    x = 304,015,982.31/20,922.14
  6. Step 6: Final answer
    x = 14,530.83

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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.