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Finding the Fourth Proportional to 18,371.34, 25,352.55 and 10,818

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Solution

The fourth proportional to 18,371.34, 25,352.55 and 10,818 is: 14,928.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,371.34 : 25,352.55 = 10,818 : x
  2. Step 2: Convert to fraction form
    18,371.34/25,352.55 = 10,818/x
  3. Step 3: Cross multiply
    18,371.34x = 25,352.55 × 10,818
  4. Step 4: Simplify right side
    18,371.34x = 274,263,885.90
  5. Step 5: Solve for x
    x = 274,263,885.90/18,371.34
  6. Step 6: Final answer
    x = 14,928.90

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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.