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Finding the Fourth Proportional to 18,726, 28,110.60 and 9,511.44

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Solution

The fourth proportional to 18,726, 28,110.60 and 9,511.44 is: 14,278.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,726 : 28,110.60 = 9,511.44 : x
  2. Step 2: Convert to fraction form
    18,726/28,110.60 = 9,511.44/x
  3. Step 3: Cross multiply
    18,726x = 28,110.60 × 9,511.44
  4. Step 4: Simplify right side
    18,726x = 267,372,285.26
  5. Step 5: Solve for x
    x = 267,372,285.26/18,726
  6. Step 6: Final answer
    x = 14,278.13

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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.