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Finding the Fourth Proportional to 18,662.54, 25,756.12 and 13,938.62

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Solution

The fourth proportional to 18,662.54, 25,756.12 and 13,938.62 is: 19,236.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,662.54 : 25,756.12 = 13,938.62 : x
  2. Step 2: Convert to fraction form
    18,662.54/25,756.12 = 13,938.62/x
  3. Step 3: Cross multiply
    18,662.54x = 25,756.12 × 13,938.62
  4. Step 4: Simplify right side
    18,662.54x = 359,004,769.35
  5. Step 5: Solve for x
    x = 359,004,769.35/18,662.54
  6. Step 6: Final answer
    x = 19,236.65

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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.