Home / 30,850.20-42,643.26-28,400.76

Finding the Fourth Proportional to 30,850.20, 42,643.26 and 28,400.76

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Solution

The fourth proportional to 30,850.20, 42,643.26 and 28,400.76 is: 39,257.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,850.20 : 42,643.26 = 28,400.76 : x
  2. Step 2: Convert to fraction form
    30,850.20/42,643.26 = 28,400.76/x
  3. Step 3: Cross multiply
    30,850.20x = 42,643.26 × 28,400.76
  4. Step 4: Simplify right side
    30,850.20x = 1,211,100,992.88
  5. Step 5: Solve for x
    x = 1,211,100,992.88/30,850.20
  6. Step 6: Final answer
    x = 39,257.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.