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Finding the Fourth Proportional to 21,988.84, 32,989.44 and 8,850.44

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Solution

The fourth proportional to 21,988.84, 32,989.44 and 8,850.44 is: 13,278.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.84 : 32,989.44 = 8,850.44 : x
  2. Step 2: Convert to fraction form
    21,988.84/32,989.44 = 8,850.44/x
  3. Step 3: Cross multiply
    21,988.84x = 32,989.44 × 8,850.44
  4. Step 4: Simplify right side
    21,988.84x = 291,971,059.35
  5. Step 5: Solve for x
    x = 291,971,059.35/21,988.84
  6. Step 6: Final answer
    x = 13,278.15

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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.