Home / 20,825.20-31,237.80-19,442.80

Finding the Fourth Proportional to 20,825.20, 31,237.80 and 19,442.80

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Solution

The fourth proportional to 20,825.20, 31,237.80 and 19,442.80 is: 29,164.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,825.20 : 31,237.80 = 19,442.80 : x
  2. Step 2: Convert to fraction form
    20,825.20/31,237.80 = 19,442.80/x
  3. Step 3: Cross multiply
    20,825.20x = 31,237.80 × 19,442.80
  4. Step 4: Simplify right side
    20,825.20x = 607,350,297.84
  5. Step 5: Solve for x
    x = 607,350,297.84/20,825.20
  6. Step 6: Final answer
    x = 29,164.20

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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.