Home / 20,786.15-28,683.82-11,352.89

Finding the Fourth Proportional to 20,786.15, 28,683.82 and 11,352.89

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Solution

The fourth proportional to 20,786.15, 28,683.82 and 11,352.89 is: 15,666.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.15 : 28,683.82 = 11,352.89 : x
  2. Step 2: Convert to fraction form
    20,786.15/28,683.82 = 11,352.89/x
  3. Step 3: Cross multiply
    20,786.15x = 28,683.82 × 11,352.89
  4. Step 4: Simplify right side
    20,786.15x = 325,644,324.95
  5. Step 5: Solve for x
    x = 325,644,324.95/20,786.15
  6. Step 6: Final answer
    x = 15,666.41

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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.