Home / 28,830.40-39,786.24-16,900.80

Finding the Fourth Proportional to 28,830.40, 39,786.24 and 16,900.80

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Solution

The fourth proportional to 28,830.40, 39,786.24 and 16,900.80 is: 23,323.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,830.40 : 39,786.24 = 16,900.80 : x
  2. Step 2: Convert to fraction form
    28,830.40/39,786.24 = 16,900.80/x
  3. Step 3: Cross multiply
    28,830.40x = 39,786.24 × 16,900.80
  4. Step 4: Simplify right side
    28,830.40x = 672,419,284.99
  5. Step 5: Solve for x
    x = 672,419,284.99/28,830.40
  6. Step 6: Final answer
    x = 23,323.27

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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.