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Finding the Fourth Proportional to 18,982,651.28, 28,484,342.78 and 8,051,140.57

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Solution

The fourth proportional to 18,982,651.28, 28,484,342.78 and 8,051,140.57 is: 12,081,107.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,982,651.28 : 28,484,342.78 = 8,051,140.57 : x
  2. Step 2: Convert to fraction form
    18,982,651.28/28,484,342.78 = 8,051,140.57/x
  3. Step 3: Cross multiply
    18,982,651.28x = 28,484,342.78 × 8,051,140.57
  4. Step 4: Simplify right side
    18,982,651.28x = 229,331,447,765,844.59
  5. Step 5: Solve for x
    x = 229,331,447,765,844.59/18,982,651.28
  6. Step 6: Final answer
    x = 12,081,107.34

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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.