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Finding the Fourth Proportional to 18,274.75, 25,223.88 and 11,917.20

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Solution

The fourth proportional to 18,274.75, 25,223.88 and 11,917.20 is: 16,448.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,274.75 : 25,223.88 = 11,917.20 : x
  2. Step 2: Convert to fraction form
    18,274.75/25,223.88 = 11,917.20/x
  3. Step 3: Cross multiply
    18,274.75x = 25,223.88 × 11,917.20
  4. Step 4: Simplify right side
    18,274.75x = 300,598,022.74
  5. Step 5: Solve for x
    x = 300,598,022.74/18,274.75
  6. Step 6: Final answer
    x = 16,448.82

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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.