Home / 31,578.99-43,586.31-20,825.80

Finding the Fourth Proportional to 31,578.99, 43,586.31 and 20,825.80

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Solution

The fourth proportional to 31,578.99, 43,586.31 and 20,825.80 is: 28,744.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,578.99 : 43,586.31 = 20,825.80 : x
  2. Step 2: Convert to fraction form
    31,578.99/43,586.31 = 20,825.80/x
  3. Step 3: Cross multiply
    31,578.99x = 43,586.31 × 20,825.80
  4. Step 4: Simplify right side
    31,578.99x = 907,719,665.83
  5. Step 5: Solve for x
    x = 907,719,665.83/31,578.99
  6. Step 6: Final answer
    x = 28,744.42

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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.