Home / 28,212.75-38,936.43-15,639.93

Finding the Fourth Proportional to 28,212.75, 38,936.43 and 15,639.93

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Solution

The fourth proportional to 28,212.75, 38,936.43 and 15,639.93 is: 21,584.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,212.75 : 38,936.43 = 15,639.93 : x
  2. Step 2: Convert to fraction form
    28,212.75/38,936.43 = 15,639.93/x
  3. Step 3: Cross multiply
    28,212.75x = 38,936.43 × 15,639.93
  4. Step 4: Simplify right side
    28,212.75x = 608,963,039.65
  5. Step 5: Solve for x
    x = 608,963,039.65/28,212.75
  6. Step 6: Final answer
    x = 21,584.68

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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.