Home / 31,420.33-43,380.35-20,824.33

Finding the Fourth Proportional to 31,420.33, 43,380.35 and 20,824.33

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Solution

The fourth proportional to 31,420.33, 43,380.35 and 20,824.33 is: 28,751.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,420.33 : 43,380.35 = 20,824.33 : x
  2. Step 2: Convert to fraction form
    31,420.33/43,380.35 = 20,824.33/x
  3. Step 3: Cross multiply
    31,420.33x = 43,380.35 × 20,824.33
  4. Step 4: Simplify right side
    31,420.33x = 903,366,559.07
  5. Step 5: Solve for x
    x = 903,366,559.07/31,420.33
  6. Step 6: Final answer
    x = 28,751.03

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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.