Home / 20,992.77-28,969.86-11,561.25

Finding the Fourth Proportional to 20,992.77, 28,969.86 and 11,561.25

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Solution

The fourth proportional to 20,992.77, 28,969.86 and 11,561.25 is: 15,954.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.77 : 28,969.86 = 11,561.25 : x
  2. Step 2: Convert to fraction form
    20,992.77/28,969.86 = 11,561.25/x
  3. Step 3: Cross multiply
    20,992.77x = 28,969.86 × 11,561.25
  4. Step 4: Simplify right side
    20,992.77x = 334,927,793.93
  5. Step 5: Solve for x
    x = 334,927,793.93/20,992.77
  6. Step 6: Final answer
    x = 15,954.44

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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.