Home / 20,383.32-28,131.66-11,999.64

Finding the Fourth Proportional to 20,383.32, 28,131.66 and 11,999.64

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Solution

The fourth proportional to 20,383.32, 28,131.66 and 11,999.64 is: 16,561.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.32 : 28,131.66 = 11,999.64 : x
  2. Step 2: Convert to fraction form
    20,383.32/28,131.66 = 11,999.64/x
  3. Step 3: Cross multiply
    20,383.32x = 28,131.66 × 11,999.64
  4. Step 4: Simplify right side
    20,383.32x = 337,569,792.60
  5. Step 5: Solve for x
    x = 337,569,792.60/20,383.32
  6. Step 6: Final answer
    x = 16,561.08

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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.