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Finding the Fourth Proportional to 8,913.90, 13,362.92 and 4,231.02

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Solution

The fourth proportional to 8,913.90, 13,362.92 and 4,231.02 is: 6,342.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,913.90 : 13,362.92 = 4,231.02 : x
  2. Step 2: Convert to fraction form
    8,913.90/13,362.92 = 4,231.02/x
  3. Step 3: Cross multiply
    8,913.90x = 13,362.92 × 4,231.02
  4. Step 4: Simplify right side
    8,913.90x = 56,538,850.40
  5. Step 5: Solve for x
    x = 56,538,850.40/8,913.90
  6. Step 6: Final answer
    x = 6,342.77

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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.