Home / 20,992.76-28,969.86-11,561.26

Finding the Fourth Proportional to 20,992.76, 28,969.86 and 11,561.26

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Solution

The fourth proportional to 20,992.76, 28,969.86 and 11,561.26 is: 15,954.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.76 : 28,969.86 = 11,561.26 : x
  2. Step 2: Convert to fraction form
    20,992.76/28,969.86 = 11,561.26/x
  3. Step 3: Cross multiply
    20,992.76x = 28,969.86 × 11,561.26
  4. Step 4: Simplify right side
    20,992.76x = 334,928,083.62
  5. Step 5: Solve for x
    x = 334,928,083.62/20,992.76
  6. Step 6: Final answer
    x = 15,954.46

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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.