Home / 20,372.33-28,113.64-11,419.92

Finding the Fourth Proportional to 20,372.33, 28,113.64 and 11,419.92

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Solution

The fourth proportional to 20,372.33, 28,113.64 and 11,419.92 is: 15,759.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,372.33 : 28,113.64 = 11,419.92 : x
  2. Step 2: Convert to fraction form
    20,372.33/28,113.64 = 11,419.92/x
  3. Step 3: Cross multiply
    20,372.33x = 28,113.64 × 11,419.92
  4. Step 4: Simplify right side
    20,372.33x = 321,055,491.16
  5. Step 5: Solve for x
    x = 321,055,491.16/20,372.33
  6. Step 6: Final answer
    x = 15,759.39

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1.5x scale

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.