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Finding the Fourth Proportional to 8,815.50, 13,223.79 and 2,659.50

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Solution

The fourth proportional to 8,815.50, 13,223.79 and 2,659.50 is: 3,989.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,815.50 : 13,223.79 = 2,659.50 : x
  2. Step 2: Convert to fraction form
    8,815.50/13,223.79 = 2,659.50/x
  3. Step 3: Cross multiply
    8,815.50x = 13,223.79 × 2,659.50
  4. Step 4: Simplify right side
    8,815.50x = 35,168,669.51
  5. Step 5: Solve for x
    x = 35,168,669.51/8,815.50
  6. Step 6: Final answer
    x = 3,989.41

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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.