Home / 20,764.93-28,651.20-13,208.50

Finding the Fourth Proportional to 20,764.93, 28,651.20 and 13,208.50

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Solution

The fourth proportional to 20,764.93, 28,651.20 and 13,208.50 is: 18,224.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.93 : 28,651.20 = 13,208.50 : x
  2. Step 2: Convert to fraction form
    20,764.93/28,651.20 = 13,208.50/x
  3. Step 3: Cross multiply
    20,764.93x = 28,651.20 × 13,208.50
  4. Step 4: Simplify right side
    20,764.93x = 378,439,375.20
  5. Step 5: Solve for x
    x = 378,439,375.20/20,764.93
  6. Step 6: Final answer
    x = 18,224.93

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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.