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Finding the Fourth Proportional to 18,801.44, 28,202.10 and 8,405.90

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Solution

The fourth proportional to 18,801.44, 28,202.10 and 8,405.90 is: 12,608.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,801.44 : 28,202.10 = 8,405.90 : x
  2. Step 2: Convert to fraction form
    18,801.44/28,202.10 = 8,405.90/x
  3. Step 3: Cross multiply
    18,801.44x = 28,202.10 × 8,405.90
  4. Step 4: Simplify right side
    18,801.44x = 237,064,032.39
  5. Step 5: Solve for x
    x = 237,064,032.39/18,801.44
  6. Step 6: Final answer
    x = 12,608.82

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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.