Home / 28,728.15-39,649.59-16,789.16

Finding the Fourth Proportional to 28,728.15, 39,649.59 and 16,789.16

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Solution

The fourth proportional to 28,728.15, 39,649.59 and 16,789.16 is: 23,171.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,728.15 : 39,649.59 = 16,789.16 : x
  2. Step 2: Convert to fraction form
    28,728.15/39,649.59 = 16,789.16/x
  3. Step 3: Cross multiply
    28,728.15x = 39,649.59 × 16,789.16
  4. Step 4: Simplify right side
    28,728.15x = 665,683,112.20
  5. Step 5: Solve for x
    x = 665,683,112.20/28,728.15
  6. Step 6: Final answer
    x = 23,171.81

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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.