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Finding the Fourth Proportional to 18,471,812.70, 27,707,719.05 and 18,219,870.30

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Solution

The fourth proportional to 18,471,812.70, 27,707,719.05 and 18,219,870.30 is: 27,329,805.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,471,812.70 : 27,707,719.05 = 18,219,870.30 : x
  2. Step 2: Convert to fraction form
    18,471,812.70/27,707,719.05 = 18,219,870.30/x
  3. Step 3: Cross multiply
    18,471,812.70x = 27,707,719.05 × 18,219,870.30
  4. Step 4: Simplify right side
    18,471,812.70x = 504,831,047,399,839.25
  5. Step 5: Solve for x
    x = 504,831,047,399,839.25/18,471,812.70
  6. Step 6: Final answer
    x = 27,329,805.45

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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.