Home / 21,826-30,120.88-12,873.92

Finding the Fourth Proportional to 21,826, 30,120.88 and 12,873.92

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Solution

The fourth proportional to 21,826, 30,120.88 and 12,873.92 is: 17,766.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,826 : 30,120.88 = 12,873.92 : x
  2. Step 2: Convert to fraction form
    21,826/30,120.88 = 12,873.92/x
  3. Step 3: Cross multiply
    21,826x = 30,120.88 × 12,873.92
  4. Step 4: Simplify right side
    21,826x = 387,773,799.45
  5. Step 5: Solve for x
    x = 387,773,799.45/21,826
  6. Step 6: Final answer
    x = 17,766.60

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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.