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Finding the Fourth Proportional to 28,679.68, 39,571.03 and 16,736.20

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Solution

The fourth proportional to 28,679.68, 39,571.03 and 16,736.20 is: 23,091.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,679.68 : 39,571.03 = 16,736.20 : x
  2. Step 2: Convert to fraction form
    28,679.68/39,571.03 = 16,736.20/x
  3. Step 3: Cross multiply
    28,679.68x = 39,571.03 × 16,736.20
  4. Step 4: Simplify right side
    28,679.68x = 662,268,390.75
  5. Step 5: Solve for x
    x = 662,268,390.75/28,679.68
  6. Step 6: Final answer
    x = 23,091.91

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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.