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Finding the Fourth Proportional to 8,490.34, 12,735.52 and 2,943.69

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Solution

The fourth proportional to 8,490.34, 12,735.52 and 2,943.69 is: 4,415.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,490.34 : 12,735.52 = 2,943.69 : x
  2. Step 2: Convert to fraction form
    8,490.34/12,735.52 = 2,943.69/x
  3. Step 3: Cross multiply
    8,490.34x = 12,735.52 × 2,943.69
  4. Step 4: Simplify right side
    8,490.34x = 37,489,344.47
  5. Step 5: Solve for x
    x = 37,489,344.47/8,490.34
  6. Step 6: Final answer
    x = 4,415.53

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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.