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Finding the Fourth Proportional to 18,606.83, 27,854.87 and 12,345.21

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Solution

The fourth proportional to 18,606.83, 27,854.87 and 12,345.21 is: 18,481.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,606.83 : 27,854.87 = 12,345.21 : x
  2. Step 2: Convert to fraction form
    18,606.83/27,854.87 = 12,345.21/x
  3. Step 3: Cross multiply
    18,606.83x = 27,854.87 × 12,345.21
  4. Step 4: Simplify right side
    18,606.83x = 343,874,157.95
  5. Step 5: Solve for x
    x = 343,874,157.95/18,606.83
  6. Step 6: Final answer
    x = 18,481.08

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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.