Home / 28,363.84-39,143.68-15,789.44

Finding the Fourth Proportional to 28,363.84, 39,143.68 and 15,789.44

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Solution

The fourth proportional to 28,363.84, 39,143.68 and 15,789.44 is: 21,790.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,363.84 : 39,143.68 = 15,789.44 : x
  2. Step 2: Convert to fraction form
    28,363.84/39,143.68 = 15,789.44/x
  3. Step 3: Cross multiply
    28,363.84x = 39,143.68 × 15,789.44
  4. Step 4: Simplify right side
    28,363.84x = 618,056,786.74
  5. Step 5: Solve for x
    x = 618,056,786.74/28,363.84
  6. Step 6: Final answer
    x = 21,790.31

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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.