Home / 20,788.82-28,712.50-15,148.80

Finding the Fourth Proportional to 20,788.82, 28,712.50 and 15,148.80

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Solution

The fourth proportional to 20,788.82, 28,712.50 and 15,148.80 is: 20,922.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.82 : 28,712.50 = 15,148.80 : x
  2. Step 2: Convert to fraction form
    20,788.82/28,712.50 = 15,148.80/x
  3. Step 3: Cross multiply
    20,788.82x = 28,712.50 × 15,148.80
  4. Step 4: Simplify right side
    20,788.82x = 434,959,920
  5. Step 5: Solve for x
    x = 434,959,920/20,788.82
  6. Step 6: Final answer
    x = 20,922.78

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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.