Home / 20,878.56-28,812.39-11,447.73

Finding the Fourth Proportional to 20,878.56, 28,812.39 and 11,447.73

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Solution

The fourth proportional to 20,878.56, 28,812.39 and 11,447.73 is: 15,797.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.56 : 28,812.39 = 11,447.73 : x
  2. Step 2: Convert to fraction form
    20,878.56/28,812.39 = 11,447.73/x
  3. Step 3: Cross multiply
    20,878.56x = 28,812.39 × 11,447.73
  4. Step 4: Simplify right side
    20,878.56x = 329,836,461.37
  5. Step 5: Solve for x
    x = 329,836,461.37/20,878.56
  6. Step 6: Final answer
    x = 15,797.85

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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.