Home / 20,511.50-28,305.89-11,080.07

Finding the Fourth Proportional to 20,511.50, 28,305.89 and 11,080.07

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Solution

The fourth proportional to 20,511.50, 28,305.89 and 11,080.07 is: 15,290.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.50 : 28,305.89 = 11,080.07 : x
  2. Step 2: Convert to fraction form
    20,511.50/28,305.89 = 11,080.07/x
  3. Step 3: Cross multiply
    20,511.50x = 28,305.89 × 11,080.07
  4. Step 4: Simplify right side
    20,511.50x = 313,631,045.68
  5. Step 5: Solve for x
    x = 313,631,045.68/20,511.50
  6. Step 6: Final answer
    x = 15,290.50

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