Home / 20,909.97-28,815.93-20,525.66

Finding the Fourth Proportional to 20,909.97, 28,815.93 and 20,525.66

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Solution

The fourth proportional to 20,909.97, 28,815.93 and 20,525.66 is: 28,286.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.97 : 28,815.93 = 20,525.66 : x
  2. Step 2: Convert to fraction form
    20,909.97/28,815.93 = 20,525.66/x
  3. Step 3: Cross multiply
    20,909.97x = 28,815.93 × 20,525.66
  4. Step 4: Simplify right side
    20,909.97x = 591,466,053.80
  5. Step 5: Solve for x
    x = 591,466,053.80/20,909.97
  6. Step 6: Final answer
    x = 28,286.32

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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.