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Finding the Fourth Proportional to 7,193,797.78, 9,927,510.66 and 3,930,612.20

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Solution

The fourth proportional to 7,193,797.78, 9,927,510.66 and 3,930,612.20 is: 5,424,282.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,193,797.78 : 9,927,510.66 = 3,930,612.20 : x
  2. Step 2: Convert to fraction form
    7,193,797.78/9,927,510.66 = 3,930,612.20/x
  3. Step 3: Cross multiply
    7,193,797.78x = 9,927,510.66 × 3,930,612.20
  4. Step 4: Simplify right side
    7,193,797.78x = 39,021,194,540,644.83
  5. Step 5: Solve for x
    x = 39,021,194,540,644.83/7,193,797.78
  6. Step 6: Final answer
    x = 5,424,282.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.