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Finding the Fourth Proportional to 18,409,921.25, 27,615,020.25 and 8,172,028.70

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Solution

The fourth proportional to 18,409,921.25, 27,615,020.25 and 8,172,028.70 is: 12,258,104.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,409,921.25 : 27,615,020.25 = 8,172,028.70 : x
  2. Step 2: Convert to fraction form
    18,409,921.25/27,615,020.25 = 8,172,028.70/x
  3. Step 3: Cross multiply
    18,409,921.25x = 27,615,020.25 × 8,172,028.70
  4. Step 4: Simplify right side
    18,409,921.25x = 225,670,738,034,081.19
  5. Step 5: Solve for x
    x = 225,670,738,034,081.19/18,409,921.25
  6. Step 6: Final answer
    x = 12,258,104.47

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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.