Home / 28,828.80-39,786.66-18,219.42

Finding the Fourth Proportional to 28,828.80, 39,786.66 and 18,219.42

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Solution

The fourth proportional to 28,828.80, 39,786.66 and 18,219.42 is: 25,144.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,828.80 : 39,786.66 = 18,219.42 : x
  2. Step 2: Convert to fraction form
    28,828.80/39,786.66 = 18,219.42/x
  3. Step 3: Cross multiply
    28,828.80x = 39,786.66 × 18,219.42
  4. Step 4: Simplify right side
    28,828.80x = 724,889,868.94
  5. Step 5: Solve for x
    x = 724,889,868.94/28,828.80
  6. Step 6: Final answer
    x = 25,144.64

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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.