Home / 30,438.06-41,970.34-19,668.75

Finding the Fourth Proportional to 30,438.06, 41,970.34 and 19,668.75

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Solution

The fourth proportional to 30,438.06, 41,970.34 and 19,668.75 is: 27,120.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,438.06 : 41,970.34 = 19,668.75 : x
  2. Step 2: Convert to fraction form
    30,438.06/41,970.34 = 19,668.75/x
  3. Step 3: Cross multiply
    30,438.06x = 41,970.34 × 19,668.75
  4. Step 4: Simplify right side
    30,438.06x = 825,504,124.88
  5. Step 5: Solve for x
    x = 825,504,124.88/30,438.06
  6. Step 6: Final answer
    x = 27,120.79

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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.