Home / 28,721.38-39,629.63-16,782.41

Finding the Fourth Proportional to 28,721.38, 39,629.63 and 16,782.41

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Solution

The fourth proportional to 28,721.38, 39,629.63 and 16,782.41 is: 23,156.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,721.38 : 39,629.63 = 16,782.41 : x
  2. Step 2: Convert to fraction form
    28,721.38/39,629.63 = 16,782.41/x
  3. Step 3: Cross multiply
    28,721.38x = 39,629.63 × 16,782.41
  4. Step 4: Simplify right side
    28,721.38x = 665,080,416.75
  5. Step 5: Solve for x
    x = 665,080,416.75/28,721.38
  6. Step 6: Final answer
    x = 23,156.29

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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.