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Finding the Fourth Proportional to 18,145.60, 25,039.20 and 10,186

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Solution

The fourth proportional to 18,145.60, 25,039.20 and 10,186 is: 14,055.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,145.60 : 25,039.20 = 10,186 : x
  2. Step 2: Convert to fraction form
    18,145.60/25,039.20 = 10,186/x
  3. Step 3: Cross multiply
    18,145.60x = 25,039.20 × 10,186
  4. Step 4: Simplify right side
    18,145.60x = 255,049,291.20
  5. Step 5: Solve for x
    x = 255,049,291.20/18,145.60
  6. Step 6: Final answer
    x = 14,055.71

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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.