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Finding the Fourth Proportional to 18,777.90, 25,912.44 and 10,278.42

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Solution

The fourth proportional to 18,777.90, 25,912.44 and 10,278.42 is: 14,183.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,777.90 : 25,912.44 = 10,278.42 : x
  2. Step 2: Convert to fraction form
    18,777.90/25,912.44 = 10,278.42/x
  3. Step 3: Cross multiply
    18,777.90x = 25,912.44 × 10,278.42
  4. Step 4: Simplify right side
    18,777.90x = 266,338,941.54
  5. Step 5: Solve for x
    x = 266,338,941.54/18,777.90
  6. Step 6: Final answer
    x = 14,183.64

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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.