Home / 28,663.40-39,553.23-15,915.38

Finding the Fourth Proportional to 28,663.40, 39,553.23 and 15,915.38

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Solution

The fourth proportional to 28,663.40, 39,553.23 and 15,915.38 is: 21,961.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,663.40 : 39,553.23 = 15,915.38 : x
  2. Step 2: Convert to fraction form
    28,663.40/39,553.23 = 15,915.38/x
  3. Step 3: Cross multiply
    28,663.40x = 39,553.23 × 15,915.38
  4. Step 4: Simplify right side
    28,663.40x = 629,504,685.68
  5. Step 5: Solve for x
    x = 629,504,685.68/28,663.40
  6. Step 6: Final answer
    x = 21,961.97

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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.