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Finding the Fourth Proportional to 18,777.20, 25,912.20 and 10,279.12

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Solution

The fourth proportional to 18,777.20, 25,912.20 and 10,279.12 is: 14,185.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,777.20 : 25,912.20 = 10,279.12 : x
  2. Step 2: Convert to fraction form
    18,777.20/25,912.20 = 10,279.12/x
  3. Step 3: Cross multiply
    18,777.20x = 25,912.20 × 10,279.12
  4. Step 4: Simplify right side
    18,777.20x = 266,354,613.26
  5. Step 5: Solve for x
    x = 266,354,613.26/18,777.20
  6. Step 6: Final answer
    x = 14,185.00

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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.