Home / 30,912.86-42,660.33-18,970.22

Finding the Fourth Proportional to 30,912.86, 42,660.33 and 18,970.22

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Solution

The fourth proportional to 30,912.86, 42,660.33 and 18,970.22 is: 26,179.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,912.86 : 42,660.33 = 18,970.22 : x
  2. Step 2: Convert to fraction form
    30,912.86/42,660.33 = 18,970.22/x
  3. Step 3: Cross multiply
    30,912.86x = 42,660.33 × 18,970.22
  4. Step 4: Simplify right side
    30,912.86x = 809,275,845.37
  5. Step 5: Solve for x
    x = 809,275,845.37/30,912.86
  6. Step 6: Final answer
    x = 26,179.26

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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.