Home / 20,822.75-28,726.59-12,759.55

Finding the Fourth Proportional to 20,822.75, 28,726.59 and 12,759.55

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Solution

The fourth proportional to 20,822.75, 28,726.59 and 12,759.55 is: 17,602.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.75 : 28,726.59 = 12,759.55 : x
  2. Step 2: Convert to fraction form
    20,822.75/28,726.59 = 12,759.55/x
  3. Step 3: Cross multiply
    20,822.75x = 28,726.59 × 12,759.55
  4. Step 4: Simplify right side
    20,822.75x = 366,538,328.54
  5. Step 5: Solve for x
    x = 366,538,328.54/20,822.75
  6. Step 6: Final answer
    x = 17,602.79

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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.