Home / 20,995.43-28,973.69-11,563.99

Finding the Fourth Proportional to 20,995.43, 28,973.69 and 11,563.99

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Solution

The fourth proportional to 20,995.43, 28,973.69 and 11,563.99 is: 15,958.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.43 : 28,973.69 = 11,563.99 : x
  2. Step 2: Convert to fraction form
    20,995.43/28,973.69 = 11,563.99/x
  3. Step 3: Cross multiply
    20,995.43x = 28,973.69 × 11,563.99
  4. Step 4: Simplify right side
    20,995.43x = 335,051,504.95
  5. Step 5: Solve for x
    x = 335,051,504.95/20,995.43
  6. Step 6: Final answer
    x = 15,958.31

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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.