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Finding the Fourth Proportional to 12,651.06, 18,978.81 and 4,329.12

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Solution

The fourth proportional to 12,651.06, 18,978.81 and 4,329.12 is: 6,494.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651.06 : 18,978.81 = 4,329.12 : x
  2. Step 2: Convert to fraction form
    12,651.06/18,978.81 = 4,329.12/x
  3. Step 3: Cross multiply
    12,651.06x = 18,978.81 × 4,329.12
  4. Step 4: Simplify right side
    12,651.06x = 82,161,545.95
  5. Step 5: Solve for x
    x = 82,161,545.95/12,651.06
  6. Step 6: Final answer
    x = 6,494.44

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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.