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Finding the Fourth Proportional to 18,782.15, 25,919.41 and 10,168.43

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Solution

The fourth proportional to 18,782.15, 25,919.41 and 10,168.43 is: 14,032.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,782.15 : 25,919.41 = 10,168.43 : x
  2. Step 2: Convert to fraction form
    18,782.15/25,919.41 = 10,168.43/x
  3. Step 3: Cross multiply
    18,782.15x = 25,919.41 × 10,168.43
  4. Step 4: Simplify right side
    18,782.15x = 263,559,639.44
  5. Step 5: Solve for x
    x = 263,559,639.44/18,782.15
  6. Step 6: Final answer
    x = 14,032.45

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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.