Home / 21,680.96-29,919.84-12,250.40

Finding the Fourth Proportional to 21,680.96, 29,919.84 and 12,250.40

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Solution

The fourth proportional to 21,680.96, 29,919.84 and 12,250.40 is: 16,905.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,680.96 : 29,919.84 = 12,250.40 : x
  2. Step 2: Convert to fraction form
    21,680.96/29,919.84 = 12,250.40/x
  3. Step 3: Cross multiply
    21,680.96x = 29,919.84 × 12,250.40
  4. Step 4: Simplify right side
    21,680.96x = 366,530,007.94
  5. Step 5: Solve for x
    x = 366,530,007.94/21,680.96
  6. Step 6: Final answer
    x = 16,905.62

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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.