Home / 20,619.86-28,453.68-11,665.31

Finding the Fourth Proportional to 20,619.86, 28,453.68 and 11,665.31

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Solution

The fourth proportional to 20,619.86, 28,453.68 and 11,665.31 is: 16,097.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.86 : 28,453.68 = 11,665.31 : x
  2. Step 2: Convert to fraction form
    20,619.86/28,453.68 = 11,665.31/x
  3. Step 3: Cross multiply
    20,619.86x = 28,453.68 × 11,665.31
  4. Step 4: Simplify right side
    20,619.86x = 331,920,855.57
  5. Step 5: Solve for x
    x = 331,920,855.57/20,619.86
  6. Step 6: Final answer
    x = 16,097.15

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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.