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Finding the Fourth Proportional to 18,364.96, 25,343.92 and 9,981.44

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Solution

The fourth proportional to 18,364.96, 25,343.92 and 9,981.44 is: 13,774.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,364.96 : 25,343.92 = 9,981.44 : x
  2. Step 2: Convert to fraction form
    18,364.96/25,343.92 = 9,981.44/x
  3. Step 3: Cross multiply
    18,364.96x = 25,343.92 × 9,981.44
  4. Step 4: Simplify right side
    18,364.96x = 252,968,816.84
  5. Step 5: Solve for x
    x = 252,968,816.84/18,364.96
  6. Step 6: Final answer
    x = 13,774.54

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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.