Home / 30,917.22-42,618.42-18,958.38

Finding the Fourth Proportional to 30,917.22, 42,618.42 and 18,958.38

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Solution

The fourth proportional to 30,917.22, 42,618.42 and 18,958.38 is: 26,133.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,917.22 : 42,618.42 = 18,958.38 : x
  2. Step 2: Convert to fraction form
    30,917.22/42,618.42 = 18,958.38/x
  3. Step 3: Cross multiply
    30,917.22x = 42,618.42 × 18,958.38
  4. Step 4: Simplify right side
    30,917.22x = 807,976,201.36
  5. Step 5: Solve for x
    x = 807,976,201.36/30,917.22
  6. Step 6: Final answer
    x = 26,133.53

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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.