Home / 30,668.23-42,321.61-18,731.57

Finding the Fourth Proportional to 30,668.23, 42,321.61 and 18,731.57

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Solution

The fourth proportional to 30,668.23, 42,321.61 and 18,731.57 is: 25,849.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,668.23 : 42,321.61 = 18,731.57 : x
  2. Step 2: Convert to fraction form
    30,668.23/42,321.61 = 18,731.57/x
  3. Step 3: Cross multiply
    30,668.23x = 42,321.61 × 18,731.57
  4. Step 4: Simplify right side
    30,668.23x = 792,750,198.87
  5. Step 5: Solve for x
    x = 792,750,198.87/30,668.23
  6. Step 6: Final answer
    x = 25,849.23

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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.