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Finding the Fourth Proportional to 18,811.10, 25,963.98 and 10,858.10

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Solution

The fourth proportional to 18,811.10, 25,963.98 and 10,858.10 is: 14,986.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811.10 : 25,963.98 = 10,858.10 : x
  2. Step 2: Convert to fraction form
    18,811.10/25,963.98 = 10,858.10/x
  3. Step 3: Cross multiply
    18,811.10x = 25,963.98 × 10,858.10
  4. Step 4: Simplify right side
    18,811.10x = 281,919,491.24
  5. Step 5: Solve for x
    x = 281,919,491.24/18,811.10
  6. Step 6: Final answer
    x = 14,986.87

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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.