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Finding the Fourth Proportional to 13,632.78, 18,813.54 and 8,330.52

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Solution

The fourth proportional to 13,632.78, 18,813.54 and 8,330.52 is: 11,496.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,632.78 : 18,813.54 = 8,330.52 : x
  2. Step 2: Convert to fraction form
    13,632.78/18,813.54 = 8,330.52/x
  3. Step 3: Cross multiply
    13,632.78x = 18,813.54 × 8,330.52
  4. Step 4: Simplify right side
    13,632.78x = 156,726,571.24
  5. Step 5: Solve for x
    x = 156,726,571.24/13,632.78
  6. Step 6: Final answer
    x = 11,496.30

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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.