Home / 20,679.86-31,019.79-5,097.48

Finding the Fourth Proportional to 20,679.86, 31,019.79 and 5,097.48

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Solution

The fourth proportional to 20,679.86, 31,019.79 and 5,097.48 is: 7,646.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.86 : 31,019.79 = 5,097.48 : x
  2. Step 2: Convert to fraction form
    20,679.86/31,019.79 = 5,097.48/x
  3. Step 3: Cross multiply
    20,679.86x = 31,019.79 × 5,097.48
  4. Step 4: Simplify right side
    20,679.86x = 158,122,759.13
  5. Step 5: Solve for x
    x = 158,122,759.13/20,679.86
  6. Step 6: Final answer
    x = 7,646.22

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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.