Home / 19,728.80-27,222.72-11,771.36

Finding the Fourth Proportional to 19,728.80, 27,222.72 and 11,771.36

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Solution

The fourth proportional to 19,728.80, 27,222.72 and 11,771.36 is: 16,242.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,728.80 : 27,222.72 = 11,771.36 : x
  2. Step 2: Convert to fraction form
    19,728.80/27,222.72 = 11,771.36/x
  3. Step 3: Cross multiply
    19,728.80x = 27,222.72 × 11,771.36
  4. Step 4: Simplify right side
    19,728.80x = 320,448,437.30
  5. Step 5: Solve for x
    x = 320,448,437.30/19,728.80
  6. Step 6: Final answer
    x = 16,242.67

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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.