Home / 20,564.80-30,849.60-13,175.20

Finding the Fourth Proportional to 20,564.80, 30,849.60 and 13,175.20

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Solution

The fourth proportional to 20,564.80, 30,849.60 and 13,175.20 is: 19,764.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,564.80 : 30,849.60 = 13,175.20 : x
  2. Step 2: Convert to fraction form
    20,564.80/30,849.60 = 13,175.20/x
  3. Step 3: Cross multiply
    20,564.80x = 30,849.60 × 13,175.20
  4. Step 4: Simplify right side
    20,564.80x = 406,449,649.92
  5. Step 5: Solve for x
    x = 406,449,649.92/20,564.80
  6. Step 6: Final answer
    x = 19,764.34

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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.