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Finding the Fourth Proportional to 8,789.68, 12,122.76 and 7,467.76

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Solution

The fourth proportional to 8,789.68, 12,122.76 and 7,467.76 is: 10,299.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,789.68 : 12,122.76 = 7,467.76 : x
  2. Step 2: Convert to fraction form
    8,789.68/12,122.76 = 7,467.76/x
  3. Step 3: Cross multiply
    8,789.68x = 12,122.76 × 7,467.76
  4. Step 4: Simplify right side
    8,789.68x = 90,529,862.22
  5. Step 5: Solve for x
    x = 90,529,862.22/8,789.68
  6. Step 6: Final answer
    x = 10,299.56

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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.