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Finding the Fourth Proportional to 13,633.59, 18,821.79 and 8,256.93

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Solution

The fourth proportional to 13,633.59, 18,821.79 and 8,256.93 is: 11,399.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,633.59 : 18,821.79 = 8,256.93 : x
  2. Step 2: Convert to fraction form
    13,633.59/18,821.79 = 8,256.93/x
  3. Step 3: Cross multiply
    13,633.59x = 18,821.79 × 8,256.93
  4. Step 4: Simplify right side
    13,633.59x = 155,410,202.50
  5. Step 5: Solve for x
    x = 155,410,202.50/13,633.59
  6. Step 6: Final answer
    x = 11,399.07

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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.