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Finding the Fourth Proportional to 11,253.60, 16,896.60 and 7,981.20

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Solution

The fourth proportional to 11,253.60, 16,896.60 and 7,981.20 is: 11,983.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,253.60 : 16,896.60 = 7,981.20 : x
  2. Step 2: Convert to fraction form
    11,253.60/16,896.60 = 7,981.20/x
  3. Step 3: Cross multiply
    11,253.60x = 16,896.60 × 7,981.20
  4. Step 4: Simplify right side
    11,253.60x = 134,855,143.92
  5. Step 5: Solve for x
    x = 134,855,143.92/11,253.60
  6. Step 6: Final answer
    x = 11,983.29

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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.