Home / 21,982.65-32,983.08-12,121.08

Finding the Fourth Proportional to 21,982.65, 32,983.08 and 12,121.08

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Solution

The fourth proportional to 21,982.65, 32,983.08 and 12,121.08 is: 18,186.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,982.65 : 32,983.08 = 12,121.08 : x
  2. Step 2: Convert to fraction form
    21,982.65/32,983.08 = 12,121.08/x
  3. Step 3: Cross multiply
    21,982.65x = 32,983.08 × 12,121.08
  4. Step 4: Simplify right side
    21,982.65x = 399,790,551.33
  5. Step 5: Solve for x
    x = 399,790,551.33/21,982.65
  6. Step 6: Final answer
    x = 18,186.64

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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.