Home / 13,438.05-18,544.74-7,388.55

Finding the Fourth Proportional to 13,438.05, 18,544.74 and 7,388.55

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Solution

The fourth proportional to 13,438.05, 18,544.74 and 7,388.55 is: 10,196.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.05 : 18,544.74 = 7,388.55 : x
  2. Step 2: Convert to fraction form
    13,438.05/18,544.74 = 7,388.55/x
  3. Step 3: Cross multiply
    13,438.05x = 18,544.74 × 7,388.55
  4. Step 4: Simplify right side
    13,438.05x = 137,018,738.73
  5. Step 5: Solve for x
    x = 137,018,738.73/13,438.05
  6. Step 6: Final answer
    x = 10,196.33

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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.