Home / 13,580.51-20,370.78-3,719.87

Finding the Fourth Proportional to 13,580.51, 20,370.78 and 3,719.87

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Solution

The fourth proportional to 13,580.51, 20,370.78 and 3,719.87 is: 5,579.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,580.51 : 20,370.78 = 3,719.87 : x
  2. Step 2: Convert to fraction form
    13,580.51/20,370.78 = 3,719.87/x
  3. Step 3: Cross multiply
    13,580.51x = 20,370.78 × 3,719.87
  4. Step 4: Simplify right side
    13,580.51x = 75,776,704.33
  5. Step 5: Solve for x
    x = 75,776,704.33/13,580.51
  6. Step 6: Final answer
    x = 5,579.81

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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.