Home / 20,643.86-28,493.66-11,696.64

Finding the Fourth Proportional to 20,643.86, 28,493.66 and 11,696.64

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Solution

The fourth proportional to 20,643.86, 28,493.66 and 11,696.64 is: 16,144.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.86 : 28,493.66 = 11,696.64 : x
  2. Step 2: Convert to fraction form
    20,643.86/28,493.66 = 11,696.64/x
  3. Step 3: Cross multiply
    20,643.86x = 28,493.66 × 11,696.64
  4. Step 4: Simplify right side
    20,643.86x = 333,280,083.30
  5. Step 5: Solve for x
    x = 333,280,083.30/20,643.86
  6. Step 6: Final answer
    x = 16,144.27

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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.