Home / 20,567.20-28,382.40-11,135.68

Finding the Fourth Proportional to 20,567.20, 28,382.40 and 11,135.68

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Solution

The fourth proportional to 20,567.20, 28,382.40 and 11,135.68 is: 15,367.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,567.20 : 28,382.40 = 11,135.68 : x
  2. Step 2: Convert to fraction form
    20,567.20/28,382.40 = 11,135.68/x
  3. Step 3: Cross multiply
    20,567.20x = 28,382.40 × 11,135.68
  4. Step 4: Simplify right side
    20,567.20x = 316,057,324.03
  5. Step 5: Solve for x
    x = 316,057,324.03/20,567.20
  6. Step 6: Final answer
    x = 15,367.06

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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.