Home / 20,781.14-28,678.15-11,829.22

Finding the Fourth Proportional to 20,781.14, 28,678.15 and 11,829.22

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Solution

The fourth proportional to 20,781.14, 28,678.15 and 11,829.22 is: 16,324.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.14 : 28,678.15 = 11,829.22 : x
  2. Step 2: Convert to fraction form
    20,781.14/28,678.15 = 11,829.22/x
  3. Step 3: Cross multiply
    20,781.14x = 28,678.15 × 11,829.22
  4. Step 4: Simplify right side
    20,781.14x = 339,240,002.15
  5. Step 5: Solve for x
    x = 339,240,002.15/20,781.14
  6. Step 6: Final answer
    x = 16,324.42

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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.