Home / 30,668.21-42,354.25-21,132.89

Finding the Fourth Proportional to 30,668.21, 42,354.25 and 21,132.89

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Solution

The fourth proportional to 30,668.21, 42,354.25 and 21,132.89 is: 29,185.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,668.21 : 42,354.25 = 21,132.89 : x
  2. Step 2: Convert to fraction form
    30,668.21/42,354.25 = 21,132.89/x
  3. Step 3: Cross multiply
    30,668.21x = 42,354.25 × 21,132.89
  4. Step 4: Simplify right side
    30,668.21x = 895,067,441.68
  5. Step 5: Solve for x
    x = 895,067,441.68/30,668.21
  6. Step 6: Final answer
    x = 29,185.52

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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.