Home / 23,023.40-31,728.86-20,172.20

Finding the Fourth Proportional to 23,023.40, 31,728.86 and 20,172.20

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Solution

The fourth proportional to 23,023.40, 31,728.86 and 20,172.20 is: 27,799.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,023.40 : 31,728.86 = 20,172.20 : x
  2. Step 2: Convert to fraction form
    23,023.40/31,728.86 = 20,172.20/x
  3. Step 3: Cross multiply
    23,023.40x = 31,728.86 × 20,172.20
  4. Step 4: Simplify right side
    23,023.40x = 640,040,650.19
  5. Step 5: Solve for x
    x = 640,040,650.19/23,023.40
  6. Step 6: Final answer
    x = 27,799.58

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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.