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Finding the Fourth Proportional to 29,861.12, 41,213.06 and 21,821.17

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Solution

The fourth proportional to 29,861.12, 41,213.06 and 21,821.17 is: 30,116.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,861.12 : 41,213.06 = 21,821.17 : x
  2. Step 2: Convert to fraction form
    29,861.12/41,213.06 = 21,821.17/x
  3. Step 3: Cross multiply
    29,861.12x = 41,213.06 × 21,821.17
  4. Step 4: Simplify right side
    29,861.12x = 899,317,237.94
  5. Step 5: Solve for x
    x = 899,317,237.94/29,861.12
  6. Step 6: Final answer
    x = 30,116.66

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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.