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Finding the Fourth Proportional to 39,669, 54,743.94 and 21,764.92

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Solution

The fourth proportional to 39,669, 54,743.94 and 21,764.92 is: 30,035.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,669 : 54,743.94 = 21,764.92 : x
  2. Step 2: Convert to fraction form
    39,669/54,743.94 = 21,764.92/x
  3. Step 3: Cross multiply
    39,669x = 54,743.94 × 21,764.92
  4. Step 4: Simplify right side
    39,669x = 1,191,497,474.58
  5. Step 5: Solve for x
    x = 1,191,497,474.58/39,669
  6. Step 6: Final answer
    x = 30,035.98

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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.