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Finding the Fourth Proportional to 8,220.75, 12,331.17 and 2,064.75

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Solution

The fourth proportional to 8,220.75, 12,331.17 and 2,064.75 is: 3,097.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,220.75 : 12,331.17 = 2,064.75 : x
  2. Step 2: Convert to fraction form
    8,220.75/12,331.17 = 2,064.75/x
  3. Step 3: Cross multiply
    8,220.75x = 12,331.17 × 2,064.75
  4. Step 4: Simplify right side
    8,220.75x = 25,460,783.26
  5. Step 5: Solve for x
    x = 25,460,783.26/8,220.75
  6. Step 6: Final answer
    x = 3,097.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.