Home / 11,816.72-17,720.67-3,917.78

Finding the Fourth Proportional to 11,816.72, 17,720.67 and 3,917.78

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Solution

The fourth proportional to 11,816.72, 17,720.67 and 3,917.78 is: 5,875.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,816.72 : 17,720.67 = 3,917.78 : x
  2. Step 2: Convert to fraction form
    11,816.72/17,720.67 = 3,917.78/x
  3. Step 3: Cross multiply
    11,816.72x = 17,720.67 × 3,917.78
  4. Step 4: Simplify right side
    11,816.72x = 69,425,686.51
  5. Step 5: Solve for x
    x = 69,425,686.51/11,816.72
  6. Step 6: Final answer
    x = 5,875.21

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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.