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Finding the Fourth Proportional to 12,934,642.40, 19,404,728.40 and 3,960,101.60

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Solution

The fourth proportional to 12,934,642.40, 19,404,728.40 and 3,960,101.60 is: 5,940,998.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,934,642.40 : 19,404,728.40 = 3,960,101.60 : x
  2. Step 2: Convert to fraction form
    12,934,642.40/19,404,728.40 = 3,960,101.60/x
  3. Step 3: Cross multiply
    12,934,642.40x = 19,404,728.40 × 3,960,101.60
  4. Step 4: Simplify right side
    12,934,642.40x = 76,844,695,984,405.44
  5. Step 5: Solve for x
    x = 76,844,695,984,405.44/12,934,642.40
  6. Step 6: Final answer
    x = 5,940,998.88

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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.