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Finding the Fourth Proportional to 18,399,396.80, 27,603,031.80 and 5,621,193.20

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Solution

The fourth proportional to 18,399,396.80, 27,603,031.80 and 5,621,193.20 is: 8,432,992.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,399,396.80 : 27,603,031.80 = 5,621,193.20 : x
  2. Step 2: Convert to fraction form
    18,399,396.80/27,603,031.80 = 5,621,193.20/x
  3. Step 3: Cross multiply
    18,399,396.80x = 27,603,031.80 × 5,621,193.20
  4. Step 4: Simplify right side
    18,399,396.80x = 155,161,974,653,543.78
  5. Step 5: Solve for x
    x = 155,161,974,653,543.78/18,399,396.80
  6. Step 6: Final answer
    x = 8,432,992.47

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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.