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Finding the Fourth Proportional to 18,371.76, 25,353.72 and 10,918.32

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Solution

The fourth proportional to 18,371.76, 25,353.72 and 10,918.32 is: 15,067.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,371.76 : 25,353.72 = 10,918.32 : x
  2. Step 2: Convert to fraction form
    18,371.76/25,353.72 = 10,918.32/x
  3. Step 3: Cross multiply
    18,371.76x = 25,353.72 × 10,918.32
  4. Step 4: Simplify right side
    18,371.76x = 276,820,028.15
  5. Step 5: Solve for x
    x = 276,820,028.15/18,371.76
  6. Step 6: Final answer
    x = 15,067.69

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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.