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Finding the Fourth Proportional to 33,639, 46,421.82 and 18,735

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Solution

The fourth proportional to 33,639, 46,421.82 and 18,735 is: 25,854.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,639 : 46,421.82 = 18,735 : x
  2. Step 2: Convert to fraction form
    33,639/46,421.82 = 18,735/x
  3. Step 3: Cross multiply
    33,639x = 46,421.82 × 18,735
  4. Step 4: Simplify right side
    33,639x = 869,712,797.70
  5. Step 5: Solve for x
    x = 869,712,797.70/33,639
  6. Step 6: Final answer
    x = 25,854.30

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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.