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Finding the Fourth Proportional to 20,646.90, 30,982.50 and 8,168.13

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Solution

The fourth proportional to 20,646.90, 30,982.50 and 8,168.13 is: 12,257.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,646.90 : 30,982.50 = 8,168.13 : x
  2. Step 2: Convert to fraction form
    20,646.90/30,982.50 = 8,168.13/x
  3. Step 3: Cross multiply
    20,646.90x = 30,982.50 × 8,168.13
  4. Step 4: Simplify right side
    20,646.90x = 253,069,087.73
  5. Step 5: Solve for x
    x = 253,069,087.73/20,646.90
  6. Step 6: Final answer
    x = 12,257.00

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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.