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Finding the Fourth Proportional to 18,775.98, 28,163.40 and 6,125.70

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Solution

The fourth proportional to 18,775.98, 28,163.40 and 6,125.70 is: 9,188.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,775.98 : 28,163.40 = 6,125.70 : x
  2. Step 2: Convert to fraction form
    18,775.98/28,163.40 = 6,125.70/x
  3. Step 3: Cross multiply
    18,775.98x = 28,163.40 × 6,125.70
  4. Step 4: Simplify right side
    18,775.98x = 172,520,539.38
  5. Step 5: Solve for x
    x = 172,520,539.38/18,775.98
  6. Step 6: Final answer
    x = 9,188.36

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Double scale
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Similar ratio
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1.5x scale

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.