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Finding the Fourth Proportional to 18,672,321.80, 28,029,477.90 and 14,431,291.40

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Solution

The fourth proportional to 18,672,321.80, 28,029,477.90 and 14,431,291.40 is: 21,663,163.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672,321.80 : 28,029,477.90 = 14,431,291.40 : x
  2. Step 2: Convert to fraction form
    18,672,321.80/28,029,477.90 = 14,431,291.40/x
  3. Step 3: Cross multiply
    18,672,321.80x = 28,029,477.90 × 14,431,291.40
  4. Step 4: Simplify right side
    18,672,321.80x = 404,501,563,364,760.06
  5. Step 5: Solve for x
    x = 404,501,563,364,760.06/18,672,321.80
  6. Step 6: Final answer
    x = 21,663,163.68

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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.