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Finding the Fourth Proportional to 12,968.20, 19,436.30 and 8,808.20

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Solution

The fourth proportional to 12,968.20, 19,436.30 and 8,808.20 is: 13,201.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,968.20 : 19,436.30 = 8,808.20 : x
  2. Step 2: Convert to fraction form
    12,968.20/19,436.30 = 8,808.20/x
  3. Step 3: Cross multiply
    12,968.20x = 19,436.30 × 8,808.20
  4. Step 4: Simplify right side
    12,968.20x = 171,198,817.66
  5. Step 5: Solve for x
    x = 171,198,817.66/12,968.20
  6. Step 6: Final answer
    x = 13,201.43

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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.