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Finding the Fourth Proportional to 18,731.06, 28,100.70 and 7,044.28

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Solution

The fourth proportional to 18,731.06, 28,100.70 and 7,044.28 is: 10,567.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,731.06 : 28,100.70 = 7,044.28 : x
  2. Step 2: Convert to fraction form
    18,731.06/28,100.70 = 7,044.28/x
  3. Step 3: Cross multiply
    18,731.06x = 28,100.70 × 7,044.28
  4. Step 4: Simplify right side
    18,731.06x = 197,949,023.27
  5. Step 5: Solve for x
    x = 197,949,023.27/18,731.06
  6. Step 6: Final answer
    x = 10,567.96

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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.