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Finding the Fourth Proportional to 8,155.90, 11,255.09 and 4,429.90

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Solution

The fourth proportional to 8,155.90, 11,255.09 and 4,429.90 is: 6,113.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,155.90 : 11,255.09 = 4,429.90 : x
  2. Step 2: Convert to fraction form
    8,155.90/11,255.09 = 4,429.90/x
  3. Step 3: Cross multiply
    8,155.90x = 11,255.09 × 4,429.90
  4. Step 4: Simplify right side
    8,155.90x = 49,858,923.19
  5. Step 5: Solve for x
    x = 49,858,923.19/8,155.90
  6. Step 6: Final answer
    x = 6,113.23

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1.5x scale

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.