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Finding the Fourth Proportional to 18,822.52, 28,243.05 and 13,311.28

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Solution

The fourth proportional to 18,822.52, 28,243.05 and 13,311.28 is: 19,973.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,822.52 : 28,243.05 = 13,311.28 : x
  2. Step 2: Convert to fraction form
    18,822.52/28,243.05 = 13,311.28/x
  3. Step 3: Cross multiply
    18,822.52x = 28,243.05 × 13,311.28
  4. Step 4: Simplify right side
    18,822.52x = 375,951,146.60
  5. Step 5: Solve for x
    x = 375,951,146.60/18,822.52
  6. Step 6: Final answer
    x = 19,973.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.