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Finding the Fourth Proportional to 21,469.80, 32,166.30 and 18,397.80

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Solution

The fourth proportional to 21,469.80, 32,166.30 and 18,397.80 is: 27,563.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,469.80 : 32,166.30 = 18,397.80 : x
  2. Step 2: Convert to fraction form
    21,469.80/32,166.30 = 18,397.80/x
  3. Step 3: Cross multiply
    21,469.80x = 32,166.30 × 18,397.80
  4. Step 4: Simplify right side
    21,469.80x = 591,789,154.14
  5. Step 5: Solve for x
    x = 591,789,154.14/21,469.80
  6. Step 6: Final answer
    x = 27,563.79

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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.