Home / 20,908.89-28,854.49-11,348.86

Finding the Fourth Proportional to 20,908.89, 28,854.49 and 11,348.86

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Solution

The fourth proportional to 20,908.89, 28,854.49 and 11,348.86 is: 15,661.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.89 : 28,854.49 = 11,348.86 : x
  2. Step 2: Convert to fraction form
    20,908.89/28,854.49 = 11,348.86/x
  3. Step 3: Cross multiply
    20,908.89x = 28,854.49 × 11,348.86
  4. Step 4: Simplify right side
    20,908.89x = 327,465,466.87
  5. Step 5: Solve for x
    x = 327,465,466.87/20,908.89
  6. Step 6: Final answer
    x = 15,661.54

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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.