Home / 19,728.55-27,218.32-11,660.51

Finding the Fourth Proportional to 19,728.55, 27,218.32 and 11,660.51

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Solution

The fourth proportional to 19,728.55, 27,218.32 and 11,660.51 is: 16,087.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,728.55 : 27,218.32 = 11,660.51 : x
  2. Step 2: Convert to fraction form
    19,728.55/27,218.32 = 11,660.51/x
  3. Step 3: Cross multiply
    19,728.55x = 27,218.32 × 11,660.51
  4. Step 4: Simplify right side
    19,728.55x = 317,379,492.54
  5. Step 5: Solve for x
    x = 317,379,492.54/19,728.55
  6. Step 6: Final answer
    x = 16,087.32

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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.