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Finding the Fourth Proportional to 18,679.75, 25,763.48 and 11,966.01

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Solution

The fourth proportional to 18,679.75, 25,763.48 and 11,966.01 is: 16,503.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679.75 : 25,763.48 = 11,966.01 : x
  2. Step 2: Convert to fraction form
    18,679.75/25,763.48 = 11,966.01/x
  3. Step 3: Cross multiply
    18,679.75x = 25,763.48 × 11,966.01
  4. Step 4: Simplify right side
    18,679.75x = 308,285,943.78
  5. Step 5: Solve for x
    x = 308,285,943.78/18,679.75
  6. Step 6: Final answer
    x = 16,503.75

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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.