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Finding the Fourth Proportional to 19,809,920.70, 29,697,601.05 and 7,687,655.10

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Solution

The fourth proportional to 19,809,920.70, 29,697,601.05 and 7,687,655.10 is: 11,524,776.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,809,920.70 : 29,697,601.05 = 7,687,655.10 : x
  2. Step 2: Convert to fraction form
    19,809,920.70/29,697,601.05 = 7,687,655.10/x
  3. Step 3: Cross multiply
    19,809,920.70x = 29,697,601.05 × 7,687,655.10
  4. Step 4: Simplify right side
    19,809,920.70x = 228,304,914,169,797.84
  5. Step 5: Solve for x
    x = 228,304,914,169,797.84/19,809,920.70
  6. Step 6: Final answer
    x = 11,524,776.78

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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.