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Finding the Fourth Proportional to 12,476,312.70, 18,714,469.05 and 7,668,411.90

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Solution

The fourth proportional to 12,476,312.70, 18,714,469.05 and 7,668,411.90 is: 11,502,617.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,476,312.70 : 18,714,469.05 = 7,668,411.90 : x
  2. Step 2: Convert to fraction form
    12,476,312.70/18,714,469.05 = 7,668,411.90/x
  3. Step 3: Cross multiply
    12,476,312.70x = 18,714,469.05 × 7,668,411.90
  4. Step 4: Simplify right side
    12,476,312.70x = 143,510,257,165,201.72
  5. Step 5: Solve for x
    x = 143,510,257,165,201.72/12,476,312.70
  6. Step 6: Final answer
    x = 11,502,617.85

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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.