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Finding the Fourth Proportional to 27,390.63, 37,790.22 and 21,629.79

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Solution

The fourth proportional to 27,390.63, 37,790.22 and 21,629.79 is: 29,842.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,390.63 : 37,790.22 = 21,629.79 : x
  2. Step 2: Convert to fraction form
    27,390.63/37,790.22 = 21,629.79/x
  3. Step 3: Cross multiply
    27,390.63x = 37,790.22 × 21,629.79
  4. Step 4: Simplify right side
    27,390.63x = 817,394,522.65
  5. Step 5: Solve for x
    x = 817,394,522.65/27,390.63
  6. Step 6: Final answer
    x = 29,842.12

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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.