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Finding the Fourth Proportional to 13,728,918.20, 20,593,377.30 and 11,178,001.40

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Solution

The fourth proportional to 13,728,918.20, 20,593,377.30 and 11,178,001.40 is: 16,767,002.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,728,918.20 : 20,593,377.30 = 11,178,001.40 : x
  2. Step 2: Convert to fraction form
    13,728,918.20/20,593,377.30 = 11,178,001.40/x
  3. Step 3: Cross multiply
    13,728,918.20x = 20,593,377.30 × 11,178,001.40
  4. Step 4: Simplify right side
    13,728,918.20x = 230,192,800,290,128.25
  5. Step 5: Solve for x
    x = 230,192,800,290,128.25/13,728,918.20
  6. Step 6: Final answer
    x = 16,767,002.10

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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.