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Finding the Fourth Proportional to 18,298.20, 25,251.60 and 9,914.70

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Solution

The fourth proportional to 18,298.20, 25,251.60 and 9,914.70 is: 13,682.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,298.20 : 25,251.60 = 9,914.70 : x
  2. Step 2: Convert to fraction form
    18,298.20/25,251.60 = 9,914.70/x
  3. Step 3: Cross multiply
    18,298.20x = 25,251.60 × 9,914.70
  4. Step 4: Simplify right side
    18,298.20x = 250,361,912.26
  5. Step 5: Solve for x
    x = 250,361,912.26/18,298.20
  6. Step 6: Final answer
    x = 13,682.33

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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.