Home / 20,778.58-28,705.80-13,625.56

Finding the Fourth Proportional to 20,778.58, 28,705.80 and 13,625.56

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Solution

The fourth proportional to 20,778.58, 28,705.80 and 13,625.56 is: 18,823.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.58 : 28,705.80 = 13,625.56 : x
  2. Step 2: Convert to fraction form
    20,778.58/28,705.80 = 13,625.56/x
  3. Step 3: Cross multiply
    20,778.58x = 28,705.80 × 13,625.56
  4. Step 4: Simplify right side
    20,778.58x = 391,132,600.25
  5. Step 5: Solve for x
    x = 391,132,600.25/20,778.58
  6. Step 6: Final answer
    x = 18,823.84

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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.