Home / 13,726.25-18,942.20-7,438.62

Finding the Fourth Proportional to 13,726.25, 18,942.20 and 7,438.62

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Solution

The fourth proportional to 13,726.25, 18,942.20 and 7,438.62 is: 10,265.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,726.25 : 18,942.20 = 7,438.62 : x
  2. Step 2: Convert to fraction form
    13,726.25/18,942.20 = 7,438.62/x
  3. Step 3: Cross multiply
    13,726.25x = 18,942.20 × 7,438.62
  4. Step 4: Simplify right side
    13,726.25x = 140,903,889.50
  5. Step 5: Solve for x
    x = 140,903,889.50/13,726.25
  6. Step 6: Final answer
    x = 10,265.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.