Home / 20,781.24-28,678.32-11,349.96

Finding the Fourth Proportional to 20,781.24, 28,678.32 and 11,349.96

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Solution

The fourth proportional to 20,781.24, 28,678.32 and 11,349.96 is: 15,663.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.24 : 28,678.32 = 11,349.96 : x
  2. Step 2: Convert to fraction form
    20,781.24/28,678.32 = 11,349.96/x
  3. Step 3: Cross multiply
    20,781.24x = 28,678.32 × 11,349.96
  4. Step 4: Simplify right side
    20,781.24x = 325,497,784.87
  5. Step 5: Solve for x
    x = 325,497,784.87/20,781.24
  6. Step 6: Final answer
    x = 15,663.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.