Home / 20,372.15-28,113.31-11,419.64

Finding the Fourth Proportional to 20,372.15, 28,113.31 and 11,419.64

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Solution

The fourth proportional to 20,372.15, 28,113.31 and 11,419.64 is: 15,758.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,372.15 : 28,113.31 = 11,419.64 : x
  2. Step 2: Convert to fraction form
    20,372.15/28,113.31 = 11,419.64/x
  3. Step 3: Cross multiply
    20,372.15x = 28,113.31 × 11,419.64
  4. Step 4: Simplify right side
    20,372.15x = 321,043,879.41
  5. Step 5: Solve for x
    x = 321,043,879.41/20,372.15
  6. Step 6: Final answer
    x = 15,758.96

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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.