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Finding the Fourth Proportional to 18,777.61, 28,181.09 and 8,254.90

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Solution

The fourth proportional to 18,777.61, 28,181.09 and 8,254.90 is: 12,388.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,777.61 : 28,181.09 = 8,254.90 : x
  2. Step 2: Convert to fraction form
    18,777.61/28,181.09 = 8,254.90/x
  3. Step 3: Cross multiply
    18,777.61x = 28,181.09 × 8,254.90
  4. Step 4: Simplify right side
    18,777.61x = 232,631,897.66
  5. Step 5: Solve for x
    x = 232,631,897.66/18,777.61
  6. Step 6: Final answer
    x = 12,388.79

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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.