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Finding the Fourth Proportional to 18,138.87, 27,204.66 and 5,656.87

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Solution

The fourth proportional to 18,138.87, 27,204.66 and 5,656.87 is: 8,484.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.87 : 27,204.66 = 5,656.87 : x
  2. Step 2: Convert to fraction form
    18,138.87/27,204.66 = 5,656.87/x
  3. Step 3: Cross multiply
    18,138.87x = 27,204.66 × 5,656.87
  4. Step 4: Simplify right side
    18,138.87x = 153,893,259.02
  5. Step 5: Solve for x
    x = 153,893,259.02/18,138.87
  6. Step 6: Final answer
    x = 8,484.17

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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.