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Finding the Fourth Proportional to 18,711.59, 28,071.99 and 5,563.89

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Solution

The fourth proportional to 18,711.59, 28,071.99 and 5,563.89 is: 8,347.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,711.59 : 28,071.99 = 5,563.89 : x
  2. Step 2: Convert to fraction form
    18,711.59/28,071.99 = 5,563.89/x
  3. Step 3: Cross multiply
    18,711.59x = 28,071.99 × 5,563.89
  4. Step 4: Simplify right side
    18,711.59x = 156,189,464.44
  5. Step 5: Solve for x
    x = 156,189,464.44/18,711.59
  6. Step 6: Final answer
    x = 8,347.21

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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.