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Finding the Fourth Proportional to 18,918.45, 26,103.48 and 10,960.20

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Solution

The fourth proportional to 18,918.45, 26,103.48 and 10,960.20 is: 15,122.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,918.45 : 26,103.48 = 10,960.20 : x
  2. Step 2: Convert to fraction form
    18,918.45/26,103.48 = 10,960.20/x
  3. Step 3: Cross multiply
    18,918.45x = 26,103.48 × 10,960.20
  4. Step 4: Simplify right side
    18,918.45x = 286,099,361.50
  5. Step 5: Solve for x
    x = 286,099,361.50/18,918.45
  6. Step 6: Final answer
    x = 15,122.77

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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.