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Finding the Fourth Proportional to 15,558,067.20, 21,738,778.80 and 15,558,067.20

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Solution

The fourth proportional to 15,558,067.20, 21,738,778.80 and 15,558,067.20 is: 21,738,778.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,558,067.20 : 21,738,778.80 = 15,558,067.20 : x
  2. Step 2: Convert to fraction form
    15,558,067.20/21,738,778.80 = 15,558,067.20/x
  3. Step 3: Cross multiply
    15,558,067.20x = 21,738,778.80 × 15,558,067.20
  4. Step 4: Simplify right side
    15,558,067.20x = 338,213,381,416,335.38
  5. Step 5: Solve for x
    x = 338,213,381,416,335.38/15,558,067.20
  6. Step 6: Final answer
    x = 21,738,778.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.