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Finding the Fourth Proportional to 8,609.11, 11,878.72 and 5,629.32

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Solution

The fourth proportional to 8,609.11, 11,878.72 and 5,629.32 is: 7,767.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,609.11 : 11,878.72 = 5,629.32 : x
  2. Step 2: Convert to fraction form
    8,609.11/11,878.72 = 5,629.32/x
  3. Step 3: Cross multiply
    8,609.11x = 11,878.72 × 5,629.32
  4. Step 4: Simplify right side
    8,609.11x = 66,869,102.00
  5. Step 5: Solve for x
    x = 66,869,102.00/8,609.11
  6. Step 6: Final answer
    x = 7,767.25

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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.