Home / 13,428.51-20,138.72-5,635.59

Finding the Fourth Proportional to 13,428.51, 20,138.72 and 5,635.59

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Solution

The fourth proportional to 13,428.51, 20,138.72 and 5,635.59 is: 8,451.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.51 : 20,138.72 = 5,635.59 : x
  2. Step 2: Convert to fraction form
    13,428.51/20,138.72 = 5,635.59/x
  3. Step 3: Cross multiply
    13,428.51x = 20,138.72 × 5,635.59
  4. Step 4: Simplify right side
    13,428.51x = 113,493,540.87
  5. Step 5: Solve for x
    x = 113,493,540.87/13,428.51
  6. Step 6: Final answer
    x = 8,451.69

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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.