Home / 30,379.65-41,918.88-20,291.91

Finding the Fourth Proportional to 30,379.65, 41,918.88 and 20,291.91

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Solution

The fourth proportional to 30,379.65, 41,918.88 and 20,291.91 is: 27,999.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,379.65 : 41,918.88 = 20,291.91 : x
  2. Step 2: Convert to fraction form
    30,379.65/41,918.88 = 20,291.91/x
  3. Step 3: Cross multiply
    30,379.65x = 41,918.88 × 20,291.91
  4. Step 4: Simplify right side
    30,379.65x = 850,613,930.67
  5. Step 5: Solve for x
    x = 850,613,930.67/30,379.65
  6. Step 6: Final answer
    x = 27,999.47

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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.