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Finding the Fourth Proportional to 18,662.76, 25,754.16 and 10,279.20

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Solution

The fourth proportional to 18,662.76, 25,754.16 and 10,279.20 is: 14,185.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,662.76 : 25,754.16 = 10,279.20 : x
  2. Step 2: Convert to fraction form
    18,662.76/25,754.16 = 10,279.20/x
  3. Step 3: Cross multiply
    18,662.76x = 25,754.16 × 10,279.20
  4. Step 4: Simplify right side
    18,662.76x = 264,732,161.47
  5. Step 5: Solve for x
    x = 264,732,161.47/18,662.76
  6. Step 6: Final answer
    x = 14,185.05

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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.