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Finding the Fourth Proportional to 21,991.40, 33,008.70 and 10,910.60

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Solution

The fourth proportional to 21,991.40, 33,008.70 and 10,910.60 is: 16,376.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,991.40 : 33,008.70 = 10,910.60 : x
  2. Step 2: Convert to fraction form
    21,991.40/33,008.70 = 10,910.60/x
  3. Step 3: Cross multiply
    21,991.40x = 33,008.70 × 10,910.60
  4. Step 4: Simplify right side
    21,991.40x = 360,144,722.22
  5. Step 5: Solve for x
    x = 360,144,722.22/21,991.40
  6. Step 6: Final answer
    x = 16,376.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.