Home / 21,344.70-29,441.94-12,961.20

Finding the Fourth Proportional to 21,344.70, 29,441.94 and 12,961.20

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Solution

The fourth proportional to 21,344.70, 29,441.94 and 12,961.20 is: 17,878.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,344.70 : 29,441.94 = 12,961.20 : x
  2. Step 2: Convert to fraction form
    21,344.70/29,441.94 = 12,961.20/x
  3. Step 3: Cross multiply
    21,344.70x = 29,441.94 × 12,961.20
  4. Step 4: Simplify right side
    21,344.70x = 381,602,872.73
  5. Step 5: Solve for x
    x = 381,602,872.73/21,344.70
  6. Step 6: Final answer
    x = 17,878.11

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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.