Home / 20,479.22-30,559.12-18,272.78

Finding the Fourth Proportional to 20,479.22, 30,559.12 and 18,272.78

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Solution

The fourth proportional to 20,479.22, 30,559.12 and 18,272.78 is: 27,266.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,479.22 : 30,559.12 = 18,272.78 : x
  2. Step 2: Convert to fraction form
    20,479.22/30,559.12 = 18,272.78/x
  3. Step 3: Cross multiply
    20,479.22x = 30,559.12 × 18,272.78
  4. Step 4: Simplify right side
    20,479.22x = 558,400,076.75
  5. Step 5: Solve for x
    x = 558,400,076.75/20,479.22
  6. Step 6: Final answer
    x = 27,266.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.