Home / 20,851.14-28,774.62-11,291.13

Finding the Fourth Proportional to 20,851.14, 28,774.62 and 11,291.13

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Solution

The fourth proportional to 20,851.14, 28,774.62 and 11,291.13 is: 15,581.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.14 : 28,774.62 = 11,291.13 : x
  2. Step 2: Convert to fraction form
    20,851.14/28,774.62 = 11,291.13/x
  3. Step 3: Cross multiply
    20,851.14x = 28,774.62 × 11,291.13
  4. Step 4: Simplify right side
    20,851.14x = 324,897,975.12
  5. Step 5: Solve for x
    x = 324,897,975.12/20,851.14
  6. Step 6: Final answer
    x = 15,581.78

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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.