Home / 28,493.28-42,698.34-20,168.78

Finding the Fourth Proportional to 28,493.28, 42,698.34 and 20,168.78

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Solution

The fourth proportional to 28,493.28, 42,698.34 and 20,168.78 is: 30,223.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,493.28 : 42,698.34 = 20,168.78 : x
  2. Step 2: Convert to fraction form
    28,493.28/42,698.34 = 20,168.78/x
  3. Step 3: Cross multiply
    28,493.28x = 42,698.34 × 20,168.78
  4. Step 4: Simplify right side
    28,493.28x = 861,173,212.33
  5. Step 5: Solve for x
    x = 861,173,212.33/28,493.28
  6. Step 6: Final answer
    x = 30,223.73

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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.