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Finding the Fourth Proportional to 21,836.40, 32,754.60 and 21,471.90

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Solution

The fourth proportional to 21,836.40, 32,754.60 and 21,471.90 is: 32,207.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,836.40 : 32,754.60 = 21,471.90 : x
  2. Step 2: Convert to fraction form
    21,836.40/32,754.60 = 21,471.90/x
  3. Step 3: Cross multiply
    21,836.40x = 32,754.60 × 21,471.90
  4. Step 4: Simplify right side
    21,836.40x = 703,303,495.74
  5. Step 5: Solve for x
    x = 703,303,495.74/21,836.40
  6. Step 6: Final answer
    x = 32,207.85

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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.