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Finding the Fourth Proportional to 28,672.20, 43,008.30 and 16,979.40

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Solution

The fourth proportional to 28,672.20, 43,008.30 and 16,979.40 is: 25,469.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,672.20 : 43,008.30 = 16,979.40 : x
  2. Step 2: Convert to fraction form
    28,672.20/43,008.30 = 16,979.40/x
  3. Step 3: Cross multiply
    28,672.20x = 43,008.30 × 16,979.40
  4. Step 4: Simplify right side
    28,672.20x = 730,255,129.02
  5. Step 5: Solve for x
    x = 730,255,129.02/28,672.20
  6. Step 6: Final answer
    x = 25,469.10

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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.