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Finding the Fourth Proportional to 18,731.81, 28,101.82 and 7,045.03

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Solution

The fourth proportional to 18,731.81, 28,101.82 and 7,045.03 is: 10,569.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,731.81 : 28,101.82 = 7,045.03 : x
  2. Step 2: Convert to fraction form
    18,731.81/28,101.82 = 7,045.03/x
  3. Step 3: Cross multiply
    18,731.81x = 28,101.82 × 7,045.03
  4. Step 4: Simplify right side
    18,731.81x = 197,978,164.95
  5. Step 5: Solve for x
    x = 197,978,164.95/18,731.81
  6. Step 6: Final answer
    x = 10,569.09

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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.