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Finding the Fourth Proportional to 8,959.96, 13,443.54 and 3,120.64

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Solution

The fourth proportional to 8,959.96, 13,443.54 and 3,120.64 is: 4,682.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,959.96 : 13,443.54 = 3,120.64 : x
  2. Step 2: Convert to fraction form
    8,959.96/13,443.54 = 3,120.64/x
  3. Step 3: Cross multiply
    8,959.96x = 13,443.54 × 3,120.64
  4. Step 4: Simplify right side
    8,959.96x = 41,952,448.67
  5. Step 5: Solve for x
    x = 41,952,448.67/8,959.96
  6. Step 6: Final answer
    x = 4,682.21

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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.