Home / 12,811.76-19,190.67-10,857.09

Finding the Fourth Proportional to 12,811.76, 19,190.67 and 10,857.09

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Solution

The fourth proportional to 12,811.76, 19,190.67 and 10,857.09 is: 16,262.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.76 : 19,190.67 = 10,857.09 : x
  2. Step 2: Convert to fraction form
    12,811.76/19,190.67 = 10,857.09/x
  3. Step 3: Cross multiply
    12,811.76x = 19,190.67 × 10,857.09
  4. Step 4: Simplify right side
    12,811.76x = 208,354,831.35
  5. Step 5: Solve for x
    x = 208,354,831.35/12,811.76
  6. Step 6: Final answer
    x = 16,262.78

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1.5x scale

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.