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Finding the Fourth Proportional to 18,907,731.26, 28,368,744.69 and 7,401,421.83

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Solution

The fourth proportional to 18,907,731.26, 28,368,744.69 and 7,401,421.83 is: 11,104,930.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907,731.26 : 28,368,744.69 = 7,401,421.83 : x
  2. Step 2: Convert to fraction form
    18,907,731.26/28,368,744.69 = 7,401,421.83/x
  3. Step 3: Cross multiply
    18,907,731.26x = 28,368,744.69 × 7,401,421.83
  4. Step 4: Simplify right side
    18,907,731.26x = 209,969,046,238,262.59
  5. Step 5: Solve for x
    x = 209,969,046,238,262.59/18,907,731.26
  6. Step 6: Final answer
    x = 11,104,930.75

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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.