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Finding the Fourth Proportional to 6,896,931.96, 9,517,763.88 and 3,998,005.68

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Solution

The fourth proportional to 6,896,931.96, 9,517,763.88 and 3,998,005.68 is: 5,517,246.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,896,931.96 : 9,517,763.88 = 3,998,005.68 : x
  2. Step 2: Convert to fraction form
    6,896,931.96/9,517,763.88 = 3,998,005.68/x
  3. Step 3: Cross multiply
    6,896,931.96x = 9,517,763.88 × 3,998,005.68
  4. Step 4: Simplify right side
    6,896,931.96x = 38,052,074,053,138.84
  5. Step 5: Solve for x
    x = 38,052,074,053,138.84/6,896,931.96
  6. Step 6: Final answer
    x = 5,517,246.55

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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.