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Finding the Fourth Proportional to 8,606.80, 11,869.56 and 5,621.68

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Solution

The fourth proportional to 8,606.80, 11,869.56 and 5,621.68 is: 7,752.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,606.80 : 11,869.56 = 5,621.68 : x
  2. Step 2: Convert to fraction form
    8,606.80/11,869.56 = 5,621.68/x
  3. Step 3: Cross multiply
    8,606.80x = 11,869.56 × 5,621.68
  4. Step 4: Simplify right side
    8,606.80x = 66,726,868.06
  5. Step 5: Solve for x
    x = 66,726,868.06/8,606.80
  6. Step 6: Final answer
    x = 7,752.81

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