Home / 28,917.65-39,914.82-16,820.96

Finding the Fourth Proportional to 28,917.65, 39,914.82 and 16,820.96

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Solution

The fourth proportional to 28,917.65, 39,914.82 and 16,820.96 is: 23,217.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,917.65 : 39,914.82 = 16,820.96 : x
  2. Step 2: Convert to fraction form
    28,917.65/39,914.82 = 16,820.96/x
  3. Step 3: Cross multiply
    28,917.65x = 39,914.82 × 16,820.96
  4. Step 4: Simplify right side
    28,917.65x = 671,405,590.63
  5. Step 5: Solve for x
    x = 671,405,590.63/28,917.65
  6. Step 6: Final answer
    x = 23,217.85

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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.