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Finding the Fourth Proportional to 21,362.60, 32,076.80 and 18,074.04

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Solution

The fourth proportional to 21,362.60, 32,076.80 and 18,074.04 is: 27,138.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,362.60 : 32,076.80 = 18,074.04 : x
  2. Step 2: Convert to fraction form
    21,362.60/32,076.80 = 18,074.04/x
  3. Step 3: Cross multiply
    21,362.60x = 32,076.80 × 18,074.04
  4. Step 4: Simplify right side
    21,362.60x = 579,757,366.27
  5. Step 5: Solve for x
    x = 579,757,366.27/21,362.60
  6. Step 6: Final answer
    x = 27,138.90

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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.