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Finding the Fourth Proportional to 21,894.72, 32,989.92 and 18,084.48

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Solution

The fourth proportional to 21,894.72, 32,989.92 and 18,084.48 is: 27,248.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,894.72 : 32,989.92 = 18,084.48 : x
  2. Step 2: Convert to fraction form
    21,894.72/32,989.92 = 18,084.48/x
  3. Step 3: Cross multiply
    21,894.72x = 32,989.92 × 18,084.48
  4. Step 4: Simplify right side
    21,894.72x = 596,605,548.44
  5. Step 5: Solve for x
    x = 596,605,548.44/21,894.72
  6. Step 6: Final answer
    x = 27,248.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.