Home / 21,213.90-31,834.62-19,590.66

Finding the Fourth Proportional to 21,213.90, 31,834.62 and 19,590.66

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Solution

The fourth proportional to 21,213.90, 31,834.62 and 19,590.66 is: 29,398.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.90 : 31,834.62 = 19,590.66 : x
  2. Step 2: Convert to fraction form
    21,213.90/31,834.62 = 19,590.66/x
  3. Step 3: Cross multiply
    21,213.90x = 31,834.62 × 19,590.66
  4. Step 4: Simplify right side
    21,213.90x = 623,661,216.65
  5. Step 5: Solve for x
    x = 623,661,216.65/21,213.90
  6. Step 6: Final answer
    x = 29,398.71

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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.