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Finding the Fourth Proportional to 18,759.98, 28,143.73 and 6,913.81

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Solution

The fourth proportional to 18,759.98, 28,143.73 and 6,913.81 is: 10,372.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,759.98 : 28,143.73 = 6,913.81 : x
  2. Step 2: Convert to fraction form
    18,759.98/28,143.73 = 6,913.81/x
  3. Step 3: Cross multiply
    18,759.98x = 28,143.73 × 6,913.81
  4. Step 4: Simplify right side
    18,759.98x = 194,580,445.73
  5. Step 5: Solve for x
    x = 194,580,445.73/18,759.98
  6. Step 6: Final answer
    x = 10,372.10

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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.