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Finding the Fourth Proportional to 8,919, 12,256.72 and 7,236.84

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Solution

The fourth proportional to 8,919, 12,256.72 and 7,236.84 is: 9,945.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919 : 12,256.72 = 7,236.84 : x
  2. Step 2: Convert to fraction form
    8,919/12,256.72 = 7,236.84/x
  3. Step 3: Cross multiply
    8,919x = 12,256.72 × 7,236.84
  4. Step 4: Simplify right side
    8,919x = 88,699,921.56
  5. Step 5: Solve for x
    x = 88,699,921.56/8,919
  6. Step 6: Final answer
    x = 9,945.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.