Home / 28,657.89-39,550.23-15,911.85

Finding the Fourth Proportional to 28,657.89, 39,550.23 and 15,911.85

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Solution

The fourth proportional to 28,657.89, 39,550.23 and 15,911.85 is: 21,959.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,657.89 : 39,550.23 = 15,911.85 : x
  2. Step 2: Convert to fraction form
    28,657.89/39,550.23 = 15,911.85/x
  3. Step 3: Cross multiply
    28,657.89x = 39,550.23 × 15,911.85
  4. Step 4: Simplify right side
    28,657.89x = 629,317,327.23
  5. Step 5: Solve for x
    x = 629,317,327.23/28,657.89
  6. Step 6: Final answer
    x = 21,959.65

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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.