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Finding the Fourth Proportional to 18,471.56, 25,484.74 and 10,918.12

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Solution

The fourth proportional to 18,471.56, 25,484.74 and 10,918.12 is: 15,063.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,471.56 : 25,484.74 = 10,918.12 : x
  2. Step 2: Convert to fraction form
    18,471.56/25,484.74 = 10,918.12/x
  3. Step 3: Cross multiply
    18,471.56x = 25,484.74 × 10,918.12
  4. Step 4: Simplify right side
    18,471.56x = 278,245,449.49
  5. Step 5: Solve for x
    x = 278,245,449.49/18,471.56
  6. Step 6: Final answer
    x = 15,063.45

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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.