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Finding the Fourth Proportional to 8,626.79, 12,943.29 and 4,247.31

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Solution

The fourth proportional to 8,626.79, 12,943.29 and 4,247.31 is: 6,372.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,626.79 : 12,943.29 = 4,247.31 : x
  2. Step 2: Convert to fraction form
    8,626.79/12,943.29 = 4,247.31/x
  3. Step 3: Cross multiply
    8,626.79x = 12,943.29 × 4,247.31
  4. Step 4: Simplify right side
    8,626.79x = 54,974,165.05
  5. Step 5: Solve for x
    x = 54,974,165.05/8,626.79
  6. Step 6: Final answer
    x = 6,372.50

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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.