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Finding the Fourth Proportional to 18,718,647.72, 28,059,371.14 and 13,026,914.62

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Solution

The fourth proportional to 18,718,647.72, 28,059,371.14 and 13,026,914.62 is: 19,527,427.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,718,647.72 : 28,059,371.14 = 13,026,914.62 : x
  2. Step 2: Convert to fraction form
    18,718,647.72/28,059,371.14 = 13,026,914.62/x
  3. Step 3: Cross multiply
    18,718,647.72x = 28,059,371.14 × 13,026,914.62
  4. Step 4: Simplify right side
    18,718,647.72x = 365,527,032,131,672.06
  5. Step 5: Solve for x
    x = 365,527,032,131,672.06/18,718,647.72
  6. Step 6: Final answer
    x = 19,527,427.28

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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.