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Finding the Fourth Proportional to 8,949.70, 12,349.83 and 5,412.70

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Solution

The fourth proportional to 8,949.70, 12,349.83 and 5,412.70 is: 7,469.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,949.70 : 12,349.83 = 5,412.70 : x
  2. Step 2: Convert to fraction form
    8,949.70/12,349.83 = 5,412.70/x
  3. Step 3: Cross multiply
    8,949.70x = 12,349.83 × 5,412.70
  4. Step 4: Simplify right side
    8,949.70x = 66,845,924.84
  5. Step 5: Solve for x
    x = 66,845,924.84/8,949.70
  6. Step 6: Final answer
    x = 7,469.07

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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.