Home / 13,428.82-20,138.40-5,106.62

Finding the Fourth Proportional to 13,428.82, 20,138.40 and 5,106.62

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Solution

The fourth proportional to 13,428.82, 20,138.40 and 5,106.62 is: 7,658.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.82 : 20,138.40 = 5,106.62 : x
  2. Step 2: Convert to fraction form
    13,428.82/20,138.40 = 5,106.62/x
  3. Step 3: Cross multiply
    13,428.82x = 20,138.40 × 5,106.62
  4. Step 4: Simplify right side
    13,428.82x = 102,839,156.21
  5. Step 5: Solve for x
    x = 102,839,156.21/13,428.82
  6. Step 6: Final answer
    x = 7,658.09

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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.