Home / 20,685.65-31,016.75-18,922.37

Finding the Fourth Proportional to 20,685.65, 31,016.75 and 18,922.37

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Solution

The fourth proportional to 20,685.65, 31,016.75 and 18,922.37 is: 28,372.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.65 : 31,016.75 = 18,922.37 : x
  2. Step 2: Convert to fraction form
    20,685.65/31,016.75 = 18,922.37/x
  3. Step 3: Cross multiply
    20,685.65x = 31,016.75 × 18,922.37
  4. Step 4: Simplify right side
    20,685.65x = 586,910,170.00
  5. Step 5: Solve for x
    x = 586,910,170.00/20,685.65
  6. Step 6: Final answer
    x = 28,372.82

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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.