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Finding the Fourth Proportional to 18,887.16, 28,305.21 and 7,194

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Solution

The fourth proportional to 18,887.16, 28,305.21 and 7,194 is: 10,781.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,887.16 : 28,305.21 = 7,194 : x
  2. Step 2: Convert to fraction form
    18,887.16/28,305.21 = 7,194/x
  3. Step 3: Cross multiply
    18,887.16x = 28,305.21 × 7,194
  4. Step 4: Simplify right side
    18,887.16x = 203,627,680.74
  5. Step 5: Solve for x
    x = 203,627,680.74/18,887.16
  6. Step 6: Final answer
    x = 10,781.28

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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.