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Finding the Fourth Proportional to 21,850.80, 32,776.20 and 8,696.40

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Solution

The fourth proportional to 21,850.80, 32,776.20 and 8,696.40 is: 13,044.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,850.80 : 32,776.20 = 8,696.40 : x
  2. Step 2: Convert to fraction form
    21,850.80/32,776.20 = 8,696.40/x
  3. Step 3: Cross multiply
    21,850.80x = 32,776.20 × 8,696.40
  4. Step 4: Simplify right side
    21,850.80x = 285,034,945.68
  5. Step 5: Solve for x
    x = 285,034,945.68/21,850.80
  6. Step 6: Final answer
    x = 13,044.60

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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.