Home / 20,851.03-28,774.20-11,290.78

Finding the Fourth Proportional to 20,851.03, 28,774.20 and 11,290.78

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Solution

The fourth proportional to 20,851.03, 28,774.20 and 11,290.78 is: 15,581.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.03 : 28,774.20 = 11,290.78 : x
  2. Step 2: Convert to fraction form
    20,851.03/28,774.20 = 11,290.78/x
  3. Step 3: Cross multiply
    20,851.03x = 28,774.20 × 11,290.78
  4. Step 4: Simplify right side
    20,851.03x = 324,883,161.88
  5. Step 5: Solve for x
    x = 324,883,161.88/20,851.03
  6. Step 6: Final answer
    x = 15,581.16

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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.