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Finding the Fourth Proportional to 18,917.19, 26,101.75 and 10,958.94

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Solution

The fourth proportional to 18,917.19, 26,101.75 and 10,958.94 is: 15,121.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,917.19 : 26,101.75 = 10,958.94 : x
  2. Step 2: Convert to fraction form
    18,917.19/26,101.75 = 10,958.94/x
  3. Step 3: Cross multiply
    18,917.19x = 26,101.75 × 10,958.94
  4. Step 4: Simplify right side
    18,917.19x = 286,047,512.15
  5. Step 5: Solve for x
    x = 286,047,512.15/18,917.19
  6. Step 6: Final answer
    x = 15,121.04

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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.