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Finding the Fourth Proportional to 18,479,682.72, 27,700,912.08 and 7,702,948.80

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Solution

The fourth proportional to 18,479,682.72, 27,700,912.08 and 7,702,948.80 is: 11,546,665.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,479,682.72 : 27,700,912.08 = 7,702,948.80 : x
  2. Step 2: Convert to fraction form
    18,479,682.72/27,700,912.08 = 7,702,948.80/x
  3. Step 3: Cross multiply
    18,479,682.72x = 27,700,912.08 × 7,702,948.80
  4. Step 4: Simplify right side
    18,479,682.72x = 213,378,707,465,541.50
  5. Step 5: Solve for x
    x = 213,378,707,465,541.50/18,479,682.72
  6. Step 6: Final answer
    x = 11,546,665.10

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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.