Home / 13,121.70-19,682.55-3,887.70

Finding the Fourth Proportional to 13,121.70, 19,682.55 and 3,887.70

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Solution

The fourth proportional to 13,121.70, 19,682.55 and 3,887.70 is: 5,831.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.70 : 19,682.55 = 3,887.70 : x
  2. Step 2: Convert to fraction form
    13,121.70/19,682.55 = 3,887.70/x
  3. Step 3: Cross multiply
    13,121.70x = 19,682.55 × 3,887.70
  4. Step 4: Simplify right side
    13,121.70x = 76,519,849.64
  5. Step 5: Solve for x
    x = 76,519,849.64/13,121.70
  6. Step 6: Final answer
    x = 5,831.55

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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.