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Finding the Fourth Proportional to 12,392.71, 17,135.57 and 12,192.40

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Solution

The fourth proportional to 12,392.71, 17,135.57 and 12,192.40 is: 16,858.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,392.71 : 17,135.57 = 12,192.40 : x
  2. Step 2: Convert to fraction form
    12,392.71/17,135.57 = 12,192.40/x
  3. Step 3: Cross multiply
    12,392.71x = 17,135.57 × 12,192.40
  4. Step 4: Simplify right side
    12,392.71x = 208,923,777.31
  5. Step 5: Solve for x
    x = 208,923,777.31/12,392.71
  6. Step 6: Final answer
    x = 16,858.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.