Home / 21,867.45-30,179.74-12,310.92

Finding the Fourth Proportional to 21,867.45, 30,179.74 and 12,310.92

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Solution

The fourth proportional to 21,867.45, 30,179.74 and 12,310.92 is: 16,990.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,867.45 : 30,179.74 = 12,310.92 : x
  2. Step 2: Convert to fraction form
    21,867.45/30,179.74 = 12,310.92/x
  3. Step 3: Cross multiply
    21,867.45x = 30,179.74 × 12,310.92
  4. Step 4: Simplify right side
    21,867.45x = 371,540,364.76
  5. Step 5: Solve for x
    x = 371,540,364.76/21,867.45
  6. Step 6: Final answer
    x = 16,990.57

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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.