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Finding the Fourth Proportional to 21,611.81, 29,824.30 and 11,675.81

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Solution

The fourth proportional to 21,611.81, 29,824.30 and 11,675.81 is: 16,112.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,611.81 : 29,824.30 = 11,675.81 : x
  2. Step 2: Convert to fraction form
    21,611.81/29,824.30 = 11,675.81/x
  3. Step 3: Cross multiply
    21,611.81x = 29,824.30 × 11,675.81
  4. Step 4: Simplify right side
    21,611.81x = 348,222,949.34
  5. Step 5: Solve for x
    x = 348,222,949.34/21,611.81
  6. Step 6: Final answer
    x = 16,112.62

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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.