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Finding the Fourth Proportional to 28,138.19, 42,207.35 and 11,498.22

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Solution

The fourth proportional to 28,138.19, 42,207.35 and 11,498.22 is: 17,247.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,138.19 : 42,207.35 = 11,498.22 : x
  2. Step 2: Convert to fraction form
    28,138.19/42,207.35 = 11,498.22/x
  3. Step 3: Cross multiply
    28,138.19x = 42,207.35 × 11,498.22
  4. Step 4: Simplify right side
    28,138.19x = 485,309,524.47
  5. Step 5: Solve for x
    x = 485,309,524.47/28,138.19
  6. Step 6: Final answer
    x = 17,247.36

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.