Home / 20,480.27-30,720.20-9,383.81

Finding the Fourth Proportional to 20,480.27, 30,720.20 and 9,383.81

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Solution

The fourth proportional to 20,480.27, 30,720.20 and 9,383.81 is: 14,075.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.27 : 30,720.20 = 9,383.81 : x
  2. Step 2: Convert to fraction form
    20,480.27/30,720.20 = 9,383.81/x
  3. Step 3: Cross multiply
    20,480.27x = 30,720.20 × 9,383.81
  4. Step 4: Simplify right side
    20,480.27x = 288,272,319.44
  5. Step 5: Solve for x
    x = 288,272,319.44/20,480.27
  6. Step 6: Final answer
    x = 14,075.61

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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.