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Finding the Fourth Proportional to 12,791,512.80, 19,197,766.80 and 12,371,608.80

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Solution

The fourth proportional to 12,791,512.80, 19,197,766.80 and 12,371,608.80 is: 18,567,566.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,791,512.80 : 19,197,766.80 = 12,371,608.80 : x
  2. Step 2: Convert to fraction form
    12,791,512.80/19,197,766.80 = 12,371,608.80/x
  3. Step 3: Cross multiply
    12,791,512.80x = 19,197,766.80 × 12,371,608.80
  4. Step 4: Simplify right side
    12,791,512.80x = 237,507,260,683,227.88
  5. Step 5: Solve for x
    x = 237,507,260,683,227.88/12,791,512.80
  6. Step 6: Final answer
    x = 18,567,566.20

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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.