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Finding the Fourth Proportional to 6,667.76, 9,196.26 and 6,220.64

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Solution

The fourth proportional to 6,667.76, 9,196.26 and 6,220.64 is: 8,579.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,667.76 : 9,196.26 = 6,220.64 : x
  2. Step 2: Convert to fraction form
    6,667.76/9,196.26 = 6,220.64/x
  3. Step 3: Cross multiply
    6,667.76x = 9,196.26 × 6,220.64
  4. Step 4: Simplify right side
    6,667.76x = 57,206,622.81
  5. Step 5: Solve for x
    x = 57,206,622.81/6,667.76
  6. Step 6: Final answer
    x = 8,579.59

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Double scale
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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.