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Finding the Fourth Proportional to 20,884.88, 28,822.28 and 12,392.03

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Solution

The fourth proportional to 20,884.88, 28,822.28 and 12,392.03 is: 17,101.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,884.88 : 28,822.28 = 12,392.03 : x
  2. Step 2: Convert to fraction form
    20,884.88/28,822.28 = 12,392.03/x
  3. Step 3: Cross multiply
    20,884.88x = 28,822.28 × 12,392.03
  4. Step 4: Simplify right side
    20,884.88x = 357,166,352.36
  5. Step 5: Solve for x
    x = 357,166,352.36/20,884.88
  6. Step 6: Final answer
    x = 17,101.68

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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.