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Finding the Fourth Proportional to 20,661.68, 30,964.68 and 11,287.62

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Solution

The fourth proportional to 20,661.68, 30,964.68 and 11,287.62 is: 16,916.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.68 : 30,964.68 = 11,287.62 : x
  2. Step 2: Convert to fraction form
    20,661.68/30,964.68 = 11,287.62/x
  3. Step 3: Cross multiply
    20,661.68x = 30,964.68 × 11,287.62
  4. Step 4: Simplify right side
    20,661.68x = 349,517,541.26
  5. Step 5: Solve for x
    x = 349,517,541.26/20,661.68
  6. Step 6: Final answer
    x = 16,916.22

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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.