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Finding the Fourth Proportional to 21,956.50, 32,938.91 and 8,809.90

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Solution

The fourth proportional to 21,956.50, 32,938.91 and 8,809.90 is: 13,216.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,956.50 : 32,938.91 = 8,809.90 : x
  2. Step 2: Convert to fraction form
    21,956.50/32,938.91 = 8,809.90/x
  3. Step 3: Cross multiply
    21,956.50x = 32,938.91 × 8,809.90
  4. Step 4: Simplify right side
    21,956.50x = 290,188,503.21
  5. Step 5: Solve for x
    x = 290,188,503.21/21,956.50
  6. Step 6: Final answer
    x = 13,216.52

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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.