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Finding the Fourth Proportional to 18,663.44, 25,748.16 and 12,996.68

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Solution

The fourth proportional to 18,663.44, 25,748.16 and 12,996.68 is: 17,930.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,663.44 : 25,748.16 = 12,996.68 : x
  2. Step 2: Convert to fraction form
    18,663.44/25,748.16 = 12,996.68/x
  3. Step 3: Cross multiply
    18,663.44x = 25,748.16 × 12,996.68
  4. Step 4: Simplify right side
    18,663.44x = 334,640,596.11
  5. Step 5: Solve for x
    x = 334,640,596.11/18,663.44
  6. Step 6: Final answer
    x = 17,930.27

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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.