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Finding the Fourth Proportional to 6,642,788.70, 9,964,183.05 and 5,036,655.90

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Solution

The fourth proportional to 6,642,788.70, 9,964,183.05 and 5,036,655.90 is: 7,554,983.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,642,788.70 : 9,964,183.05 = 5,036,655.90 : x
  2. Step 2: Convert to fraction form
    6,642,788.70/9,964,183.05 = 5,036,655.90/x
  3. Step 3: Cross multiply
    6,642,788.70x = 9,964,183.05 × 5,036,655.90
  4. Step 4: Simplify right side
    6,642,788.70x = 50,186,161,347,462.50
  5. Step 5: Solve for x
    x = 50,186,161,347,462.50/6,642,788.70
  6. Step 6: Final answer
    x = 7,554,983.85

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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.