Home / 8,639.40-11,919.42-5,658.60

Finding the Fourth Proportional to 8,639.40, 11,919.42 and 5,658.60

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Solution

The fourth proportional to 8,639.40, 11,919.42 and 5,658.60 is: 7,806.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.40 : 11,919.42 = 5,658.60 : x
  2. Step 2: Convert to fraction form
    8,639.40/11,919.42 = 5,658.60/x
  3. Step 3: Cross multiply
    8,639.40x = 11,919.42 × 5,658.60
  4. Step 4: Simplify right side
    8,639.40x = 67,447,230.01
  5. Step 5: Solve for x
    x = 67,447,230.01/8,639.40
  6. Step 6: Final answer
    x = 7,806.93

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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.