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Finding the Fourth Proportional to 8,490.71, 12,735.31 and 2,943.93

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Solution

The fourth proportional to 8,490.71, 12,735.31 and 2,943.93 is: 4,415.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,490.71 : 12,735.31 = 2,943.93 : x
  2. Step 2: Convert to fraction form
    8,490.71/12,735.31 = 2,943.93/x
  3. Step 3: Cross multiply
    8,490.71x = 12,735.31 × 2,943.93
  4. Step 4: Simplify right side
    8,490.71x = 37,491,861.17
  5. Step 5: Solve for x
    x = 37,491,861.17/8,490.71
  6. Step 6: Final answer
    x = 4,415.63

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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.