Home / 10,917.70-16,390.38-9,091.15

Finding the Fourth Proportional to 10,917.70, 16,390.38 and 9,091.15

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Solution

The fourth proportional to 10,917.70, 16,390.38 and 9,091.15 is: 13,648.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,917.70 : 16,390.38 = 9,091.15 : x
  2. Step 2: Convert to fraction form
    10,917.70/16,390.38 = 9,091.15/x
  3. Step 3: Cross multiply
    10,917.70x = 16,390.38 × 9,091.15
  4. Step 4: Simplify right side
    10,917.70x = 149,007,403.14
  5. Step 5: Solve for x
    x = 149,007,403.14/10,917.70
  6. Step 6: Final answer
    x = 13,648.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.