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Finding the Fourth Proportional to 18,755.42, 28,122.47 and 7,649.10

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Solution

The fourth proportional to 18,755.42, 28,122.47 and 7,649.10 is: 11,469.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,755.42 : 28,122.47 = 7,649.10 : x
  2. Step 2: Convert to fraction form
    18,755.42/28,122.47 = 7,649.10/x
  3. Step 3: Cross multiply
    18,755.42x = 28,122.47 × 7,649.10
  4. Step 4: Simplify right side
    18,755.42x = 215,111,585.28
  5. Step 5: Solve for x
    x = 215,111,585.28/18,755.42
  6. Step 6: Final answer
    x = 11,469.30

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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.