Home / 20,370.22-28,111.24-11,419.72

Finding the Fourth Proportional to 20,370.22, 28,111.24 and 11,419.72

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Solution

The fourth proportional to 20,370.22, 28,111.24 and 11,419.72 is: 15,759.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,370.22 : 28,111.24 = 11,419.72 : x
  2. Step 2: Convert to fraction form
    20,370.22/28,111.24 = 11,419.72/x
  3. Step 3: Cross multiply
    20,370.22x = 28,111.24 × 11,419.72
  4. Step 4: Simplify right side
    20,370.22x = 321,022,489.65
  5. Step 5: Solve for x
    x = 321,022,489.65/20,370.22
  6. Step 6: Final answer
    x = 15,759.40

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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.