Home / 13,778.09-19,018.05-8,112.38

Finding the Fourth Proportional to 13,778.09, 19,018.05 and 8,112.38

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Solution

The fourth proportional to 13,778.09, 19,018.05 and 8,112.38 is: 11,197.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,778.09 : 19,018.05 = 8,112.38 : x
  2. Step 2: Convert to fraction form
    13,778.09/19,018.05 = 8,112.38/x
  3. Step 3: Cross multiply
    13,778.09x = 19,018.05 × 8,112.38
  4. Step 4: Simplify right side
    13,778.09x = 154,281,648.46
  5. Step 5: Solve for x
    x = 154,281,648.46/13,778.09
  6. Step 6: Final answer
    x = 11,197.61

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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.