Home / 20,823.42-28,735.66-11,391.38

Finding the Fourth Proportional to 20,823.42, 28,735.66 and 11,391.38

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Solution

The fourth proportional to 20,823.42, 28,735.66 and 11,391.38 is: 15,719.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.42 : 28,735.66 = 11,391.38 : x
  2. Step 2: Convert to fraction form
    20,823.42/28,735.66 = 11,391.38/x
  3. Step 3: Cross multiply
    20,823.42x = 28,735.66 × 11,391.38
  4. Step 4: Simplify right side
    20,823.42x = 327,338,822.61
  5. Step 5: Solve for x
    x = 327,338,822.61/20,823.42
  6. Step 6: Final answer
    x = 15,719.74

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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.