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Finding the Fourth Proportional to 12,498,759.60, 18,716,646.60 and 8,215,738.80

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Solution

The fourth proportional to 12,498,759.60, 18,716,646.60 and 8,215,738.80 is: 12,302,907.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,498,759.60 : 18,716,646.60 = 8,215,738.80 : x
  2. Step 2: Convert to fraction form
    12,498,759.60/18,716,646.60 = 8,215,738.80/x
  3. Step 3: Cross multiply
    12,498,759.60x = 18,716,646.60 × 8,215,738.80
  4. Step 4: Simplify right side
    12,498,759.60x = 153,771,079,677,508.09
  5. Step 5: Solve for x
    x = 153,771,079,677,508.09/12,498,759.60
  6. Step 6: Final answer
    x = 12,302,907.22

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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.