Home / 20,896.47-28,836.87-11,465.03

Finding the Fourth Proportional to 20,896.47, 28,836.87 and 11,465.03

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Solution

The fourth proportional to 20,896.47, 28,836.87 and 11,465.03 is: 15,821.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,896.47 : 28,836.87 = 11,465.03 : x
  2. Step 2: Convert to fraction form
    20,896.47/28,836.87 = 11,465.03/x
  3. Step 3: Cross multiply
    20,896.47x = 28,836.87 × 11,465.03
  4. Step 4: Simplify right side
    20,896.47x = 330,615,435.47
  5. Step 5: Solve for x
    x = 330,615,435.47/20,896.47
  6. Step 6: Final answer
    x = 15,821.59

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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.