Home / 28,728.81-39,645.63-16,789.73

Finding the Fourth Proportional to 28,728.81, 39,645.63 and 16,789.73

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Solution

The fourth proportional to 28,728.81, 39,645.63 and 16,789.73 is: 23,169.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,728.81 : 39,645.63 = 16,789.73 : x
  2. Step 2: Convert to fraction form
    28,728.81/39,645.63 = 16,789.73/x
  3. Step 3: Cross multiply
    28,728.81x = 39,645.63 × 16,789.73
  4. Step 4: Simplify right side
    28,728.81x = 665,639,225.15
  5. Step 5: Solve for x
    x = 665,639,225.15/28,728.81
  6. Step 6: Final answer
    x = 23,169.75

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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.