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Finding the Fourth Proportional to 12,940,874.40, 19,401,980.40 and 7,262,839.20

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Solution

The fourth proportional to 12,940,874.40, 19,401,980.40 and 7,262,839.20 is: 10,889,021.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,940,874.40 : 19,401,980.40 = 7,262,839.20 : x
  2. Step 2: Convert to fraction form
    12,940,874.40/19,401,980.40 = 7,262,839.20/x
  3. Step 3: Cross multiply
    12,940,874.40x = 19,401,980.40 × 7,262,839.20
  4. Step 4: Simplify right side
    12,940,874.40x = 140,913,463,806,751.69
  5. Step 5: Solve for x
    x = 140,913,463,806,751.69/12,940,874.40
  6. Step 6: Final answer
    x = 10,889,021.83

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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.