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Finding the Fourth Proportional to 8,223.12, 11,349.34 and 7,949.74

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Solution

The fourth proportional to 8,223.12, 11,349.34 and 7,949.74 is: 10,972.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,223.12 : 11,349.34 = 7,949.74 : x
  2. Step 2: Convert to fraction form
    8,223.12/11,349.34 = 7,949.74/x
  3. Step 3: Cross multiply
    8,223.12x = 11,349.34 × 7,949.74
  4. Step 4: Simplify right side
    8,223.12x = 90,224,302.17
  5. Step 5: Solve for x
    x = 90,224,302.17/8,223.12
  6. Step 6: Final answer
    x = 10,972.03

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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.