Home / 20,851.06-28,774.56-11,419.62

Finding the Fourth Proportional to 20,851.06, 28,774.56 and 11,419.62

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Solution

The fourth proportional to 20,851.06, 28,774.56 and 11,419.62 is: 15,759.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.06 : 28,774.56 = 11,419.62 : x
  2. Step 2: Convert to fraction form
    20,851.06/28,774.56 = 11,419.62/x
  3. Step 3: Cross multiply
    20,851.06x = 28,774.56 × 11,419.62
  4. Step 4: Simplify right side
    20,851.06x = 328,594,540.87
  5. Step 5: Solve for x
    x = 328,594,540.87/20,851.06
  6. Step 6: Final answer
    x = 15,759.13

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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.