Home / 28,921.20-39,915.44-16,991.04

Finding the Fourth Proportional to 28,921.20, 39,915.44 and 16,991.04

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Solution

The fourth proportional to 28,921.20, 39,915.44 and 16,991.04 is: 23,450.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,921.20 : 39,915.44 = 16,991.04 : x
  2. Step 2: Convert to fraction form
    28,921.20/39,915.44 = 16,991.04/x
  3. Step 3: Cross multiply
    28,921.20x = 39,915.44 × 16,991.04
  4. Step 4: Simplify right side
    28,921.20x = 678,204,837.66
  5. Step 5: Solve for x
    x = 678,204,837.66/28,921.20
  6. Step 6: Final answer
    x = 23,450.09

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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.