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Finding the Fourth Proportional to 39,668.90, 54,743.64 and 21,763.58

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Solution

The fourth proportional to 39,668.90, 54,743.64 and 21,763.58 is: 30,034.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,668.90 : 54,743.64 = 21,763.58 : x
  2. Step 2: Convert to fraction form
    39,668.90/54,743.64 = 21,763.58/x
  3. Step 3: Cross multiply
    39,668.90x = 54,743.64 × 21,763.58
  4. Step 4: Simplify right side
    39,668.90x = 1,191,417,588.63
  5. Step 5: Solve for x
    x = 1,191,417,588.63/39,668.90
  6. Step 6: Final answer
    x = 30,034.05

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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.