Home / 13,580.45-20,370.69-3,719.81

Finding the Fourth Proportional to 13,580.45, 20,370.69 and 3,719.81

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Solution

The fourth proportional to 13,580.45, 20,370.69 and 3,719.81 is: 5,579.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,580.45 : 20,370.69 = 3,719.81 : x
  2. Step 2: Convert to fraction form
    13,580.45/20,370.69 = 3,719.81/x
  3. Step 3: Cross multiply
    13,580.45x = 20,370.69 × 3,719.81
  4. Step 4: Simplify right side
    13,580.45x = 75,775,096.37
  5. Step 5: Solve for x
    x = 75,775,096.37/13,580.45
  6. Step 6: Final answer
    x = 5,579.72

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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.