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Finding the Fourth Proportional to 18,731.18, 28,100.87 and 7,044.40

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Solution

The fourth proportional to 18,731.18, 28,100.87 and 7,044.40 is: 10,568.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,731.18 : 28,100.87 = 7,044.40 : x
  2. Step 2: Convert to fraction form
    18,731.18/28,100.87 = 7,044.40/x
  3. Step 3: Cross multiply
    18,731.18x = 28,100.87 × 7,044.40
  4. Step 4: Simplify right side
    18,731.18x = 197,953,768.63
  5. Step 5: Solve for x
    x = 197,953,768.63/18,731.18
  6. Step 6: Final answer
    x = 10,568.14

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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.