Home / 30,739.56-42,431.22-18,163.50

Finding the Fourth Proportional to 30,739.56, 42,431.22 and 18,163.50

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Solution

The fourth proportional to 30,739.56, 42,431.22 and 18,163.50 is: 25,071.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,739.56 : 42,431.22 = 18,163.50 : x
  2. Step 2: Convert to fraction form
    30,739.56/42,431.22 = 18,163.50/x
  3. Step 3: Cross multiply
    30,739.56x = 42,431.22 × 18,163.50
  4. Step 4: Simplify right side
    30,739.56x = 770,699,464.47
  5. Step 5: Solve for x
    x = 770,699,464.47/30,739.56
  6. Step 6: Final answer
    x = 25,071.91

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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.