Home / 20,884.64-28,820.42-11,809.88

Finding the Fourth Proportional to 20,884.64, 28,820.42 and 11,809.88

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Solution

The fourth proportional to 20,884.64, 28,820.42 and 11,809.88 is: 16,297.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,884.64 : 28,820.42 = 11,809.88 : x
  2. Step 2: Convert to fraction form
    20,884.64/28,820.42 = 11,809.88/x
  3. Step 3: Cross multiply
    20,884.64x = 28,820.42 × 11,809.88
  4. Step 4: Simplify right side
    20,884.64x = 340,365,642.70
  5. Step 5: Solve for x
    x = 340,365,642.70/20,884.64
  6. Step 6: Final answer
    x = 16,297.41

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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.