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Finding the Fourth Proportional to 18,270.81, 25,213.19 and 10,313.78

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Solution

The fourth proportional to 18,270.81, 25,213.19 and 10,313.78 is: 14,232.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,270.81 : 25,213.19 = 10,313.78 : x
  2. Step 2: Convert to fraction form
    18,270.81/25,213.19 = 10,313.78/x
  3. Step 3: Cross multiply
    18,270.81x = 25,213.19 × 10,313.78
  4. Step 4: Simplify right side
    18,270.81x = 260,043,117.12
  5. Step 5: Solve for x
    x = 260,043,117.12/18,270.81
  6. Step 6: Final answer
    x = 14,232.71

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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.