Home / 20,812.82-28,730.23-14,107.64

Finding the Fourth Proportional to 20,812.82, 28,730.23 and 14,107.64

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Solution

The fourth proportional to 20,812.82, 28,730.23 and 14,107.64 is: 19,474.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.82 : 28,730.23 = 14,107.64 : x
  2. Step 2: Convert to fraction form
    20,812.82/28,730.23 = 14,107.64/x
  3. Step 3: Cross multiply
    20,812.82x = 28,730.23 × 14,107.64
  4. Step 4: Simplify right side
    20,812.82x = 405,315,563.04
  5. Step 5: Solve for x
    x = 405,315,563.04/20,812.82
  6. Step 6: Final answer
    x = 19,474.33

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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.