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Finding the Fourth Proportional to 18,635.56, 25,717.55 and 10,138.16

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Solution

The fourth proportional to 18,635.56, 25,717.55 and 10,138.16 is: 13,990.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,635.56 : 25,717.55 = 10,138.16 : x
  2. Step 2: Convert to fraction form
    18,635.56/25,717.55 = 10,138.16/x
  3. Step 3: Cross multiply
    18,635.56x = 25,717.55 × 10,138.16
  4. Step 4: Simplify right side
    18,635.56x = 260,728,586.02
  5. Step 5: Solve for x
    x = 260,728,586.02/18,635.56
  6. Step 6: Final answer
    x = 13,990.92

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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.