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Finding the Fourth Proportional to 18,662.94, 25,747.47 and 12,996.18

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Solution

The fourth proportional to 18,662.94, 25,747.47 and 12,996.18 is: 17,929.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,662.94 : 25,747.47 = 12,996.18 : x
  2. Step 2: Convert to fraction form
    18,662.94/25,747.47 = 12,996.18/x
  3. Step 3: Cross multiply
    18,662.94x = 25,747.47 × 12,996.18
  4. Step 4: Simplify right side
    18,662.94x = 334,618,754.66
  5. Step 5: Solve for x
    x = 334,618,754.66/18,662.94
  6. Step 6: Final answer
    x = 17,929.58

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Similar ratio
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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.