Home / 20,884.78-28,820.37-11,453.14

Finding the Fourth Proportional to 20,884.78, 28,820.37 and 11,453.14

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Solution

The fourth proportional to 20,884.78, 28,820.37 and 11,453.14 is: 15,804.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,884.78 : 28,820.37 = 11,453.14 : x
  2. Step 2: Convert to fraction form
    20,884.78/28,820.37 = 11,453.14/x
  3. Step 3: Cross multiply
    20,884.78x = 28,820.37 × 11,453.14
  4. Step 4: Simplify right side
    20,884.78x = 330,083,732.46
  5. Step 5: Solve for x
    x = 330,083,732.46/20,884.78
  6. Step 6: Final answer
    x = 15,804.99

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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.