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Finding the Fourth Proportional to 12,006.73, 18,012.12 and 4,990.51

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Solution

The fourth proportional to 12,006.73, 18,012.12 and 4,990.51 is: 7,486.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,006.73 : 18,012.12 = 4,990.51 : x
  2. Step 2: Convert to fraction form
    12,006.73/18,012.12 = 4,990.51/x
  3. Step 3: Cross multiply
    12,006.73x = 18,012.12 × 4,990.51
  4. Step 4: Simplify right side
    12,006.73x = 89,889,664.98
  5. Step 5: Solve for x
    x = 89,889,664.98/12,006.73
  6. Step 6: Final answer
    x = 7,486.61

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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.