Home / 21,867.55-30,104.19-20,863.25

Finding the Fourth Proportional to 21,867.55, 30,104.19 and 20,863.25

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Solution

The fourth proportional to 21,867.55, 30,104.19 and 20,863.25 is: 28,721.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,867.55 : 30,104.19 = 20,863.25 : x
  2. Step 2: Convert to fraction form
    21,867.55/30,104.19 = 20,863.25/x
  3. Step 3: Cross multiply
    21,867.55x = 30,104.19 × 20,863.25
  4. Step 4: Simplify right side
    21,867.55x = 628,071,204.39
  5. Step 5: Solve for x
    x = 628,071,204.39/21,867.55
  6. Step 6: Final answer
    x = 28,721.61

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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.