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Finding the Fourth Proportional to 6,930,694.74, 9,564,717.49 and 3,990,948.50

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Solution

The fourth proportional to 6,930,694.74, 9,564,717.49 and 3,990,948.50 is: 5,507,715.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,930,694.74 : 9,564,717.49 = 3,990,948.50 : x
  2. Step 2: Convert to fraction form
    6,930,694.74/9,564,717.49 = 3,990,948.50/x
  3. Step 3: Cross multiply
    6,930,694.74x = 9,564,717.49 × 3,990,948.50
  4. Step 4: Simplify right side
    6,930,694.74x = 38,172,294,919,639.27
  5. Step 5: Solve for x
    x = 38,172,294,919,639.27/6,930,694.74
  6. Step 6: Final answer
    x = 5,507,715.51

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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.