Home / 20,448.87-30,660.91-13,338.42

Finding the Fourth Proportional to 20,448.87, 30,660.91 and 13,338.42

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Solution

The fourth proportional to 20,448.87, 30,660.91 and 13,338.42 is: 19,999.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,448.87 : 30,660.91 = 13,338.42 : x
  2. Step 2: Convert to fraction form
    20,448.87/30,660.91 = 13,338.42/x
  3. Step 3: Cross multiply
    20,448.87x = 30,660.91 × 13,338.42
  4. Step 4: Simplify right side
    20,448.87x = 408,967,875.17
  5. Step 5: Solve for x
    x = 408,967,875.17/20,448.87
  6. Step 6: Final answer
    x = 19,999.54

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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.