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Finding the Fourth Proportional to 8,640,469.80, 12,960,704.70 and 2,656,837.80

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Solution

The fourth proportional to 8,640,469.80, 12,960,704.70 and 2,656,837.80 is: 3,985,256.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640,469.80 : 12,960,704.70 = 2,656,837.80 : x
  2. Step 2: Convert to fraction form
    8,640,469.80/12,960,704.70 = 2,656,837.80/x
  3. Step 3: Cross multiply
    8,640,469.80x = 12,960,704.70 × 2,656,837.80
  4. Step 4: Simplify right side
    8,640,469.80x = 34,434,490,161,597.66
  5. Step 5: Solve for x
    x = 34,434,490,161,597.66/8,640,469.80
  6. Step 6: Final answer
    x = 3,985,256.70

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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.