Home / 28,414.95-39,198.22-21,688.90

Finding the Fourth Proportional to 28,414.95, 39,198.22 and 21,688.90

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Solution

The fourth proportional to 28,414.95, 39,198.22 and 21,688.90 is: 29,919.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,414.95 : 39,198.22 = 21,688.90 : x
  2. Step 2: Convert to fraction form
    28,414.95/39,198.22 = 21,688.90/x
  3. Step 3: Cross multiply
    28,414.95x = 39,198.22 × 21,688.90
  4. Step 4: Simplify right side
    28,414.95x = 850,166,273.76
  5. Step 5: Solve for x
    x = 850,166,273.76/28,414.95
  6. Step 6: Final answer
    x = 29,919.68

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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.