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Finding the Fourth Proportional to 18,808.50, 25,956.03 and 11,255.15

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Solution

The fourth proportional to 18,808.50, 25,956.03 and 11,255.15 is: 15,532.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,808.50 : 25,956.03 = 11,255.15 : x
  2. Step 2: Convert to fraction form
    18,808.50/25,956.03 = 11,255.15/x
  3. Step 3: Cross multiply
    18,808.50x = 25,956.03 × 11,255.15
  4. Step 4: Simplify right side
    18,808.50x = 292,138,954.78
  5. Step 5: Solve for x
    x = 292,138,954.78/18,808.50
  6. Step 6: Final answer
    x = 15,532.28

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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.