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Finding the Fourth Proportional to 18,610.56, 27,918.72 and 11,585.16

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Solution

The fourth proportional to 18,610.56, 27,918.72 and 11,585.16 is: 17,379.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,610.56 : 27,918.72 = 11,585.16 : x
  2. Step 2: Convert to fraction form
    18,610.56/27,918.72 = 11,585.16/x
  3. Step 3: Cross multiply
    18,610.56x = 27,918.72 × 11,585.16
  4. Step 4: Simplify right side
    18,610.56x = 323,442,838.20
  5. Step 5: Solve for x
    x = 323,442,838.20/18,610.56
  6. Step 6: Final answer
    x = 17,379.53

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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.