Home / 28,196.75-38,912.79-15,621.50

Finding the Fourth Proportional to 28,196.75, 38,912.79 and 15,621.50

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Solution

The fourth proportional to 28,196.75, 38,912.79 and 15,621.50 is: 21,558.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,196.75 : 38,912.79 = 15,621.50 : x
  2. Step 2: Convert to fraction form
    28,196.75/38,912.79 = 15,621.50/x
  3. Step 3: Cross multiply
    28,196.75x = 38,912.79 × 15,621.50
  4. Step 4: Simplify right side
    28,196.75x = 607,876,148.99
  5. Step 5: Solve for x
    x = 607,876,148.99/28,196.75
  6. Step 6: Final answer
    x = 21,558.38

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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.