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Finding the Fourth Proportional to 21,860.60, 32,790.90 and 17,486.60

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Solution

The fourth proportional to 21,860.60, 32,790.90 and 17,486.60 is: 26,229.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,860.60 : 32,790.90 = 17,486.60 : x
  2. Step 2: Convert to fraction form
    21,860.60/32,790.90 = 17,486.60/x
  3. Step 3: Cross multiply
    21,860.60x = 32,790.90 × 17,486.60
  4. Step 4: Simplify right side
    21,860.60x = 573,401,351.94
  5. Step 5: Solve for x
    x = 573,401,351.94/21,860.60
  6. Step 6: Final answer
    x = 26,229.90

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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.