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Finding the Fourth Proportional to 18,674.66, 25,769.20 and 11,119.49

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Solution

The fourth proportional to 18,674.66, 25,769.20 and 11,119.49 is: 15,343.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,674.66 : 25,769.20 = 11,119.49 : x
  2. Step 2: Convert to fraction form
    18,674.66/25,769.20 = 11,119.49/x
  3. Step 3: Cross multiply
    18,674.66x = 25,769.20 × 11,119.49
  4. Step 4: Simplify right side
    18,674.66x = 286,540,177.26
  5. Step 5: Solve for x
    x = 286,540,177.26/18,674.66
  6. Step 6: Final answer
    x = 15,343.80

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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.