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Finding the Fourth Proportional to 39,668.88, 54,741.24 and 21,763.50

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Solution

The fourth proportional to 39,668.88, 54,741.24 and 21,763.50 is: 30,032.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,668.88 : 54,741.24 = 21,763.50 : x
  2. Step 2: Convert to fraction form
    39,668.88/54,741.24 = 21,763.50/x
  3. Step 3: Cross multiply
    39,668.88x = 54,741.24 × 21,763.50
  4. Step 4: Simplify right side
    39,668.88x = 1,191,360,976.74
  5. Step 5: Solve for x
    x = 1,191,360,976.74/39,668.88
  6. Step 6: Final answer
    x = 30,032.63

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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.