Home / 11,821.38-17,720.10-7,664.02

Finding the Fourth Proportional to 11,821.38, 17,720.10 and 7,664.02

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Solution

The fourth proportional to 11,821.38, 17,720.10 and 7,664.02 is: 11,488.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,821.38 : 17,720.10 = 7,664.02 : x
  2. Step 2: Convert to fraction form
    11,821.38/17,720.10 = 7,664.02/x
  3. Step 3: Cross multiply
    11,821.38x = 17,720.10 × 7,664.02
  4. Step 4: Simplify right side
    11,821.38x = 135,807,200.80
  5. Step 5: Solve for x
    x = 135,807,200.80/11,821.38
  6. Step 6: Final answer
    x = 11,488.27

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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.