Home / 26,080.80-39,121.20-20,443.20

Finding the Fourth Proportional to 26,080.80, 39,121.20 and 20,443.20

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Solution

The fourth proportional to 26,080.80, 39,121.20 and 20,443.20 is: 30,664.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,080.80 : 39,121.20 = 20,443.20 : x
  2. Step 2: Convert to fraction form
    26,080.80/39,121.20 = 20,443.20/x
  3. Step 3: Cross multiply
    26,080.80x = 39,121.20 × 20,443.20
  4. Step 4: Simplify right side
    26,080.80x = 799,762,515.84
  5. Step 5: Solve for x
    x = 799,762,515.84/26,080.80
  6. Step 6: Final answer
    x = 30,664.80

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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.