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Finding the Fourth Proportional to 12,342.63, 18,513.95 and 3,108.63

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Solution

The fourth proportional to 12,342.63, 18,513.95 and 3,108.63 is: 4,662.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,342.63 : 18,513.95 = 3,108.63 : x
  2. Step 2: Convert to fraction form
    12,342.63/18,513.95 = 3,108.63/x
  3. Step 3: Cross multiply
    12,342.63x = 18,513.95 × 3,108.63
  4. Step 4: Simplify right side
    12,342.63x = 57,553,020.39
  5. Step 5: Solve for x
    x = 57,553,020.39/12,342.63
  6. Step 6: Final answer
    x = 4,662.95

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Similar ratio
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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.