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Finding the Fourth Proportional to 18,812.92, 25,964.52 and 10,857.88

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Solution

The fourth proportional to 18,812.92, 25,964.52 and 10,857.88 is: 14,985.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,812.92 : 25,964.52 = 10,857.88 : x
  2. Step 2: Convert to fraction form
    18,812.92/25,964.52 = 10,857.88/x
  3. Step 3: Cross multiply
    18,812.92x = 25,964.52 × 10,857.88
  4. Step 4: Simplify right side
    18,812.92x = 281,919,642.42
  5. Step 5: Solve for x
    x = 281,919,642.42/18,812.92
  6. Step 6: Final answer
    x = 14,985.43

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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.