Home / 20,645.67-28,493.42-19,378.97

Finding the Fourth Proportional to 20,645.67, 28,493.42 and 19,378.97

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Solution

The fourth proportional to 20,645.67, 28,493.42 and 19,378.97 is: 26,745.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.67 : 28,493.42 = 19,378.97 : x
  2. Step 2: Convert to fraction form
    20,645.67/28,493.42 = 19,378.97/x
  3. Step 3: Cross multiply
    20,645.67x = 28,493.42 × 19,378.97
  4. Step 4: Simplify right side
    20,645.67x = 552,172,892.02
  5. Step 5: Solve for x
    x = 552,172,892.02/20,645.67
  6. Step 6: Final answer
    x = 26,745.22

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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.