Home / 20,438.67-28,195.52-17,781.87

Finding the Fourth Proportional to 20,438.67, 28,195.52 and 17,781.87

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Solution

The fourth proportional to 20,438.67, 28,195.52 and 17,781.87 is: 24,530.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.67 : 28,195.52 = 17,781.87 : x
  2. Step 2: Convert to fraction form
    20,438.67/28,195.52 = 17,781.87/x
  3. Step 3: Cross multiply
    20,438.67x = 28,195.52 × 17,781.87
  4. Step 4: Simplify right side
    20,438.67x = 501,368,982.31
  5. Step 5: Solve for x
    x = 501,368,982.31/20,438.67
  6. Step 6: Final answer
    x = 24,530.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.