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Finding the Fourth Proportional to 28,134.15, 42,201.29 and 11,494.20

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Solution

The fourth proportional to 28,134.15, 42,201.29 and 11,494.20 is: 17,241.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,134.15 : 42,201.29 = 11,494.20 : x
  2. Step 2: Convert to fraction form
    28,134.15/42,201.29 = 11,494.20/x
  3. Step 3: Cross multiply
    28,134.15x = 42,201.29 × 11,494.20
  4. Step 4: Simplify right side
    28,134.15x = 485,070,010.05
  5. Step 5: Solve for x
    x = 485,070,010.05/28,134.15
  6. Step 6: Final answer
    x = 17,241.32

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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.