Home / 20,361.54-28,085.22-11,978.04

Finding the Fourth Proportional to 20,361.54, 28,085.22 and 11,978.04

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Solution

The fourth proportional to 20,361.54, 28,085.22 and 11,978.04 is: 16,521.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,361.54 : 28,085.22 = 11,978.04 : x
  2. Step 2: Convert to fraction form
    20,361.54/28,085.22 = 11,978.04/x
  3. Step 3: Cross multiply
    20,361.54x = 28,085.22 × 11,978.04
  4. Step 4: Simplify right side
    20,361.54x = 336,405,888.57
  5. Step 5: Solve for x
    x = 336,405,888.57/20,361.54
  6. Step 6: Final answer
    x = 16,521.63

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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.