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Finding the Fourth Proportional to 6,639,750.98, 9,959,979.78 and 2,091,155.48

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Solution

The fourth proportional to 6,639,750.98, 9,959,979.78 and 2,091,155.48 is: 3,136,844.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639,750.98 : 9,959,979.78 = 2,091,155.48 : x
  2. Step 2: Convert to fraction form
    6,639,750.98/9,959,979.78 = 2,091,155.48/x
  3. Step 3: Cross multiply
    6,639,750.98x = 9,959,979.78 × 2,091,155.48
  4. Step 4: Simplify right side
    6,639,750.98x = 20,827,866,297,636.19
  5. Step 5: Solve for x
    x = 20,827,866,297,636.19/6,639,750.98
  6. Step 6: Final answer
    x = 3,136,844.49

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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.