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Finding the Fourth Proportional to 18,732.81, 28,103.40 and 7,046.13

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Solution

The fourth proportional to 18,732.81, 28,103.40 and 7,046.13 is: 10,570.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,732.81 : 28,103.40 = 7,046.13 : x
  2. Step 2: Convert to fraction form
    18,732.81/28,103.40 = 7,046.13/x
  3. Step 3: Cross multiply
    18,732.81x = 28,103.40 × 7,046.13
  4. Step 4: Simplify right side
    18,732.81x = 198,020,209.84
  5. Step 5: Solve for x
    x = 198,020,209.84/18,732.81
  6. Step 6: Final answer
    x = 10,570.77

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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.