Home / 30,861.33-42,589.46-18,917.79

Finding the Fourth Proportional to 30,861.33, 42,589.46 and 18,917.79

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Solution

The fourth proportional to 30,861.33, 42,589.46 and 18,917.79 is: 26,107.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,861.33 : 42,589.46 = 18,917.79 : x
  2. Step 2: Convert to fraction form
    30,861.33/42,589.46 = 18,917.79/x
  3. Step 3: Cross multiply
    30,861.33x = 42,589.46 × 18,917.79
  4. Step 4: Simplify right side
    30,861.33x = 805,698,365.90
  5. Step 5: Solve for x
    x = 805,698,365.90/30,861.33
  6. Step 6: Final answer
    x = 26,107.05

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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.