Home / 13,778.46-19,018.57-8,112.76

Finding the Fourth Proportional to 13,778.46, 19,018.57 and 8,112.76

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Solution

The fourth proportional to 13,778.46, 19,018.57 and 8,112.76 is: 11,198.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,778.46 : 19,018.57 = 8,112.76 : x
  2. Step 2: Convert to fraction form
    13,778.46/19,018.57 = 8,112.76/x
  3. Step 3: Cross multiply
    13,778.46x = 19,018.57 × 8,112.76
  4. Step 4: Simplify right side
    13,778.46x = 154,292,998.86
  5. Step 5: Solve for x
    x = 154,292,998.86/13,778.46
  6. Step 6: Final answer
    x = 11,198.13

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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.