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Finding the Fourth Proportional to 28,859.42, 39,812.99 and 16,917.72

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Solution

The fourth proportional to 28,859.42, 39,812.99 and 16,917.72 is: 23,338.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,859.42 : 39,812.99 = 16,917.72 : x
  2. Step 2: Convert to fraction form
    28,859.42/39,812.99 = 16,917.72/x
  3. Step 3: Cross multiply
    28,859.42x = 39,812.99 × 16,917.72
  4. Step 4: Simplify right side
    28,859.42x = 673,544,932.59
  5. Step 5: Solve for x
    x = 673,544,932.59/28,859.42
  6. Step 6: Final answer
    x = 23,338.82

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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.