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Finding the Fourth Proportional to 8,612.75, 12,916.31 and 3,347.39

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Solution

The fourth proportional to 8,612.75, 12,916.31 and 3,347.39 is: 5,019.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.75 : 12,916.31 = 3,347.39 : x
  2. Step 2: Convert to fraction form
    8,612.75/12,916.31 = 3,347.39/x
  3. Step 3: Cross multiply
    8,612.75x = 12,916.31 × 3,347.39
  4. Step 4: Simplify right side
    8,612.75x = 43,235,942.48
  5. Step 5: Solve for x
    x = 43,235,942.48/8,612.75
  6. Step 6: Final answer
    x = 5,019.99

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1.5x scale

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.