Home / 20,823.39-28,736.51-11,391.75

Finding the Fourth Proportional to 20,823.39, 28,736.51 and 11,391.75

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Solution

The fourth proportional to 20,823.39, 28,736.51 and 11,391.75 is: 15,720.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.39 : 28,736.51 = 11,391.75 : x
  2. Step 2: Convert to fraction form
    20,823.39/28,736.51 = 11,391.75/x
  3. Step 3: Cross multiply
    20,823.39x = 28,736.51 × 11,391.75
  4. Step 4: Simplify right side
    20,823.39x = 327,359,080.83
  5. Step 5: Solve for x
    x = 327,359,080.83/20,823.39
  6. Step 6: Final answer
    x = 15,720.74

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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.