Home / 20,920.44-31,380.54-5,125.56

Finding the Fourth Proportional to 20,920.44, 31,380.54 and 5,125.56

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Solution

The fourth proportional to 20,920.44, 31,380.54 and 5,125.56 is: 7,688.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920.44 : 31,380.54 = 5,125.56 : x
  2. Step 2: Convert to fraction form
    20,920.44/31,380.54 = 5,125.56/x
  3. Step 3: Cross multiply
    20,920.44x = 31,380.54 × 5,125.56
  4. Step 4: Simplify right side
    20,920.44x = 160,842,840.60
  5. Step 5: Solve for x
    x = 160,842,840.60/20,920.44
  6. Step 6: Final answer
    x = 7,688.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.