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Finding the Fourth Proportional to 21,989.80, 33,000.90 and 8,851.60

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Solution

The fourth proportional to 21,989.80, 33,000.90 and 8,851.60 is: 13,283.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,989.80 : 33,000.90 = 8,851.60 : x
  2. Step 2: Convert to fraction form
    21,989.80/33,000.90 = 8,851.60/x
  3. Step 3: Cross multiply
    21,989.80x = 33,000.90 × 8,851.60
  4. Step 4: Simplify right side
    21,989.80x = 292,110,766.44
  5. Step 5: Solve for x
    x = 292,110,766.44/21,989.80
  6. Step 6: Final answer
    x = 13,283.92

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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.