Home / 20,406.76-30,571.18-13,821.64

Finding the Fourth Proportional to 20,406.76, 30,571.18 and 13,821.64

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Solution

The fourth proportional to 20,406.76, 30,571.18 and 13,821.64 is: 20,706.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,406.76 : 30,571.18 = 13,821.64 : x
  2. Step 2: Convert to fraction form
    20,406.76/30,571.18 = 13,821.64/x
  3. Step 3: Cross multiply
    20,406.76x = 30,571.18 × 13,821.64
  4. Step 4: Simplify right side
    20,406.76x = 422,543,844.34
  5. Step 5: Solve for x
    x = 422,543,844.34/20,406.76
  6. Step 6: Final answer
    x = 20,706.07

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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.