Home / 13,689.72-20,531.44-3,829.70

Finding the Fourth Proportional to 13,689.72, 20,531.44 and 3,829.70

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Solution

The fourth proportional to 13,689.72, 20,531.44 and 3,829.70 is: 5,743.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689.72 : 20,531.44 = 3,829.70 : x
  2. Step 2: Convert to fraction form
    13,689.72/20,531.44 = 3,829.70/x
  3. Step 3: Cross multiply
    13,689.72x = 20,531.44 × 3,829.70
  4. Step 4: Simplify right side
    13,689.72x = 78,629,255.77
  5. Step 5: Solve for x
    x = 78,629,255.77/13,689.72
  6. Step 6: Final answer
    x = 5,743.67

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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.