Home / 28,422.21-39,208.21-21,696.15

Finding the Fourth Proportional to 28,422.21, 39,208.21 and 21,696.15

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Solution

The fourth proportional to 28,422.21, 39,208.21 and 21,696.15 is: 29,929.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,422.21 : 39,208.21 = 21,696.15 : x
  2. Step 2: Convert to fraction form
    28,422.21/39,208.21 = 21,696.15/x
  3. Step 3: Cross multiply
    28,422.21x = 39,208.21 × 21,696.15
  4. Step 4: Simplify right side
    28,422.21x = 850,667,205.39
  5. Step 5: Solve for x
    x = 850,667,205.39/28,422.21
  6. Step 6: Final answer
    x = 29,929.66

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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.