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Finding the Fourth Proportional to 12,642.48, 18,964.11 and 4,321.03

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Solution

The fourth proportional to 12,642.48, 18,964.11 and 4,321.03 is: 6,481.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,642.48 : 18,964.11 = 4,321.03 : x
  2. Step 2: Convert to fraction form
    12,642.48/18,964.11 = 4,321.03/x
  3. Step 3: Cross multiply
    12,642.48x = 18,964.11 × 4,321.03
  4. Step 4: Simplify right side
    12,642.48x = 81,944,552.84
  5. Step 5: Solve for x
    x = 81,944,552.84/12,642.48
  6. Step 6: Final answer
    x = 6,481.68

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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.