Home / 28,318.35-39,076.52-21,608.31

Finding the Fourth Proportional to 28,318.35, 39,076.52 and 21,608.31

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Solution

The fourth proportional to 28,318.35, 39,076.52 and 21,608.31 is: 29,817.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,318.35 : 39,076.52 = 21,608.31 : x
  2. Step 2: Convert to fraction form
    28,318.35/39,076.52 = 21,608.31/x
  3. Step 3: Cross multiply
    28,318.35x = 39,076.52 × 21,608.31
  4. Step 4: Simplify right side
    28,318.35x = 844,377,449.84
  5. Step 5: Solve for x
    x = 844,377,449.84/28,318.35
  6. Step 6: Final answer
    x = 29,817.33

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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.