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Finding the Fourth Proportional to 12,634.79, 18,962.51 and 8,940.58

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Solution

The fourth proportional to 12,634.79, 18,962.51 and 8,940.58 is: 13,418.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,634.79 : 18,962.51 = 8,940.58 : x
  2. Step 2: Convert to fraction form
    12,634.79/18,962.51 = 8,940.58/x
  3. Step 3: Cross multiply
    12,634.79x = 18,962.51 × 8,940.58
  4. Step 4: Simplify right side
    12,634.79x = 169,535,745.55
  5. Step 5: Solve for x
    x = 169,535,745.55/12,634.79
  6. Step 6: Final answer
    x = 13,418.17

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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.