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Finding the Fourth Proportional to 18,362.34, 25,340.04 and 9,978.84

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Solution

The fourth proportional to 18,362.34, 25,340.04 and 9,978.84 is: 13,770.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,362.34 : 25,340.04 = 9,978.84 : x
  2. Step 2: Convert to fraction form
    18,362.34/25,340.04 = 9,978.84/x
  3. Step 3: Cross multiply
    18,362.34x = 25,340.04 × 9,978.84
  4. Step 4: Simplify right side
    18,362.34x = 252,864,204.75
  5. Step 5: Solve for x
    x = 252,864,204.75/18,362.34
  6. Step 6: Final answer
    x = 13,770.81

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.