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Finding the Fourth Proportional to 18,219.92, 25,143.63 and 10,261.40

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Solution

The fourth proportional to 18,219.92, 25,143.63 and 10,261.40 is: 14,160.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,219.92 : 25,143.63 = 10,261.40 : x
  2. Step 2: Convert to fraction form
    18,219.92/25,143.63 = 10,261.40/x
  3. Step 3: Cross multiply
    18,219.92x = 25,143.63 × 10,261.40
  4. Step 4: Simplify right side
    18,219.92x = 258,008,844.88
  5. Step 5: Solve for x
    x = 258,008,844.88/18,219.92
  6. Step 6: Final answer
    x = 14,160.81

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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.