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Finding the Fourth Proportional to 18,361, 25,338.18 and 9,977.50

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Solution

The fourth proportional to 18,361, 25,338.18 and 9,977.50 is: 13,768.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,361 : 25,338.18 = 9,977.50 : x
  2. Step 2: Convert to fraction form
    18,361/25,338.18 = 9,977.50/x
  3. Step 3: Cross multiply
    18,361x = 25,338.18 × 9,977.50
  4. Step 4: Simplify right side
    18,361x = 252,811,690.95
  5. Step 5: Solve for x
    x = 252,811,690.95/18,361
  6. Step 6: Final answer
    x = 13,768.95

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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.