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Finding the Fourth Proportional to 18,508.51, 27,759.67 and 6,659.87

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Solution

The fourth proportional to 18,508.51, 27,759.67 and 6,659.87 is: 9,988.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,508.51 : 27,759.67 = 6,659.87 : x
  2. Step 2: Convert to fraction form
    18,508.51/27,759.67 = 6,659.87/x
  3. Step 3: Cross multiply
    18,508.51x = 27,759.67 × 6,659.87
  4. Step 4: Simplify right side
    18,508.51x = 184,875,840.97
  5. Step 5: Solve for x
    x = 184,875,840.97/18,508.51
  6. Step 6: Final answer
    x = 9,988.69

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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.