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Finding the Fourth Proportional to 18,345.56, 27,528.93 and 9,912.09

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Solution

The fourth proportional to 18,345.56, 27,528.93 and 9,912.09 is: 14,873.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,345.56 : 27,528.93 = 9,912.09 : x
  2. Step 2: Convert to fraction form
    18,345.56/27,528.93 = 9,912.09/x
  3. Step 3: Cross multiply
    18,345.56x = 27,528.93 × 9,912.09
  4. Step 4: Simplify right side
    18,345.56x = 272,869,310.15
  5. Step 5: Solve for x
    x = 272,869,310.15/18,345.56
  6. Step 6: Final answer
    x = 14,873.86

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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.