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Finding the Fourth Proportional to 12,855,429.60, 19,245,819.60 and 12,482,181.60

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Solution

The fourth proportional to 12,855,429.60, 19,245,819.60 and 12,482,181.60 is: 18,687,031.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,855,429.60 : 19,245,819.60 = 12,482,181.60 : x
  2. Step 2: Convert to fraction form
    12,855,429.60/19,245,819.60 = 12,482,181.60/x
  3. Step 3: Cross multiply
    12,855,429.60x = 19,245,819.60 × 12,482,181.60
  4. Step 4: Simplify right side
    12,855,429.60x = 240,229,815,288,039.38
  5. Step 5: Solve for x
    x = 240,229,815,288,039.38/12,855,429.60
  6. Step 6: Final answer
    x = 18,687,031.30

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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.