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Finding the Fourth Proportional to 12,664.65, 18,996.98 and 12,300.15

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Solution

The fourth proportional to 12,664.65, 18,996.98 and 12,300.15 is: 18,450.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,664.65 : 18,996.98 = 12,300.15 : x
  2. Step 2: Convert to fraction form
    12,664.65/18,996.98 = 12,300.15/x
  3. Step 3: Cross multiply
    12,664.65x = 18,996.98 × 12,300.15
  4. Step 4: Simplify right side
    12,664.65x = 233,665,642.05
  5. Step 5: Solve for x
    x = 233,665,642.05/12,664.65
  6. Step 6: Final answer
    x = 18,450.23

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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.