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Finding the Fourth Proportional to 47,790.39, 65,954.21 and 28,671

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Solution

The fourth proportional to 47,790.39, 65,954.21 and 28,671 is: 39,568.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,790.39 : 65,954.21 = 28,671 : x
  2. Step 2: Convert to fraction form
    47,790.39/65,954.21 = 28,671/x
  3. Step 3: Cross multiply
    47,790.39x = 65,954.21 × 28,671
  4. Step 4: Simplify right side
    47,790.39x = 1,890,973,011.56
  5. Step 5: Solve for x
    x = 1,890,973,011.56/47,790.39
  6. Step 6: Final answer
    x = 39,568.06

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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.