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Finding the Fourth Proportional to 8,640.48, 11,922.96 and 5,103.12

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Solution

The fourth proportional to 8,640.48, 11,922.96 and 5,103.12 is: 7,041.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.48 : 11,922.96 = 5,103.12 : x
  2. Step 2: Convert to fraction form
    8,640.48/11,922.96 = 5,103.12/x
  3. Step 3: Cross multiply
    8,640.48x = 11,922.96 × 5,103.12
  4. Step 4: Simplify right side
    8,640.48x = 60,844,295.64
  5. Step 5: Solve for x
    x = 60,844,295.64/8,640.48
  6. Step 6: Final answer
    x = 7,041.77

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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.