Home / 20,618.48-28,453.56-11,187.02

Finding the Fourth Proportional to 20,618.48, 28,453.56 and 11,187.02

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Solution

The fourth proportional to 20,618.48, 28,453.56 and 11,187.02 is: 15,438.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.48 : 28,453.56 = 11,187.02 : x
  2. Step 2: Convert to fraction form
    20,618.48/28,453.56 = 11,187.02/x
  3. Step 3: Cross multiply
    20,618.48x = 28,453.56 × 11,187.02
  4. Step 4: Simplify right side
    20,618.48x = 318,310,544.79
  5. Step 5: Solve for x
    x = 318,310,544.79/20,618.48
  6. Step 6: Final answer
    x = 15,438.12

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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.