Home / 28,128.97-38,782.69-18,039.61

Finding the Fourth Proportional to 28,128.97, 38,782.69 and 18,039.61

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Solution

The fourth proportional to 28,128.97, 38,782.69 and 18,039.61 is: 24,872.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,128.97 : 38,782.69 = 18,039.61 : x
  2. Step 2: Convert to fraction form
    28,128.97/38,782.69 = 18,039.61/x
  3. Step 3: Cross multiply
    28,128.97x = 38,782.69 × 18,039.61
  4. Step 4: Simplify right side
    28,128.97x = 699,624,602.35
  5. Step 5: Solve for x
    x = 699,624,602.35/28,128.97
  6. Step 6: Final answer
    x = 24,872.03

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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.