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Finding the Fourth Proportional to 18,816.76, 25,961.22 and 10,857.94

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Solution

The fourth proportional to 18,816.76, 25,961.22 and 10,857.94 is: 14,980.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,816.76 : 25,961.22 = 10,857.94 : x
  2. Step 2: Convert to fraction form
    18,816.76/25,961.22 = 10,857.94/x
  3. Step 3: Cross multiply
    18,816.76x = 25,961.22 × 10,857.94
  4. Step 4: Simplify right side
    18,816.76x = 281,885,369.09
  5. Step 5: Solve for x
    x = 281,885,369.09/18,816.76
  6. Step 6: Final answer
    x = 14,980.55

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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.