Home / 20,854.25-28,778.88-11,422.85

Finding the Fourth Proportional to 20,854.25, 28,778.88 and 11,422.85

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Solution

The fourth proportional to 20,854.25, 28,778.88 and 11,422.85 is: 15,763.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.25 : 28,778.88 = 11,422.85 : x
  2. Step 2: Convert to fraction form
    20,854.25/28,778.88 = 11,422.85/x
  3. Step 3: Cross multiply
    20,854.25x = 28,778.88 × 11,422.85
  4. Step 4: Simplify right side
    20,854.25x = 328,736,829.41
  5. Step 5: Solve for x
    x = 328,736,829.41/20,854.25
  6. Step 6: Final answer
    x = 15,763.54

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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.