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Finding the Fourth Proportional to 20,912,398.02, 28,855,978.65 and 11,743,269.30

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Solution

The fourth proportional to 20,912,398.02, 28,855,978.65 and 11,743,269.30 is: 16,203,953.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912,398.02 : 28,855,978.65 = 11,743,269.30 : x
  2. Step 2: Convert to fraction form
    20,912,398.02/28,855,978.65 = 11,743,269.30/x
  3. Step 3: Cross multiply
    20,912,398.02x = 28,855,978.65 × 11,743,269.30
  4. Step 4: Simplify right side
    20,912,398.02x = 338,863,528,202,000.44
  5. Step 5: Solve for x
    x = 338,863,528,202,000.44/20,912,398.02
  6. Step 6: Final answer
    x = 16,203,953.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.