Home / 13,421.76-20,128.32-5,626.56

Finding the Fourth Proportional to 13,421.76, 20,128.32 and 5,626.56

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Solution

The fourth proportional to 13,421.76, 20,128.32 and 5,626.56 is: 8,438.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.76 : 20,128.32 = 5,626.56 : x
  2. Step 2: Convert to fraction form
    13,421.76/20,128.32 = 5,626.56/x
  3. Step 3: Cross multiply
    13,421.76x = 20,128.32 × 5,626.56
  4. Step 4: Simplify right side
    13,421.76x = 113,253,200.18
  5. Step 5: Solve for x
    x = 113,253,200.18/13,421.76
  6. Step 6: Final answer
    x = 8,438.03

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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.