Home / 30,922.89-42,708.41-20,892.75

Finding the Fourth Proportional to 30,922.89, 42,708.41 and 20,892.75

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Solution

The fourth proportional to 30,922.89, 42,708.41 and 20,892.75 is: 28,855.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,922.89 : 42,708.41 = 20,892.75 : x
  2. Step 2: Convert to fraction form
    30,922.89/42,708.41 = 20,892.75/x
  3. Step 3: Cross multiply
    30,922.89x = 42,708.41 × 20,892.75
  4. Step 4: Simplify right side
    30,922.89x = 892,296,133.03
  5. Step 5: Solve for x
    x = 892,296,133.03/30,922.89
  6. Step 6: Final answer
    x = 28,855.52

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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.