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Finding the Fourth Proportional to 28,958.25, 39,958.99 and 16,212.13

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Solution

The fourth proportional to 28,958.25, 39,958.99 and 16,212.13 is: 22,370.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,958.25 : 39,958.99 = 16,212.13 : x
  2. Step 2: Convert to fraction form
    28,958.25/39,958.99 = 16,212.13/x
  3. Step 3: Cross multiply
    28,958.25x = 39,958.99 × 16,212.13
  4. Step 4: Simplify right side
    28,958.25x = 647,820,340.55
  5. Step 5: Solve for x
    x = 647,820,340.55/28,958.25
  6. Step 6: Final answer
    x = 22,370.84

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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.