Home / 20,878.70-28,811.77-11,447.26

Finding the Fourth Proportional to 20,878.70, 28,811.77 and 11,447.26

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Solution

The fourth proportional to 20,878.70, 28,811.77 and 11,447.26 is: 15,796.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.70 : 28,811.77 = 11,447.26 : x
  2. Step 2: Convert to fraction form
    20,878.70/28,811.77 = 11,447.26/x
  3. Step 3: Cross multiply
    20,878.70x = 28,811.77 × 11,447.26
  4. Step 4: Simplify right side
    20,878.70x = 329,815,721.60
  5. Step 5: Solve for x
    x = 329,815,721.60/20,878.70
  6. Step 6: Final answer
    x = 15,796.76

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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.