Home / 30,313.88-41,821.56-18,978.68

Finding the Fourth Proportional to 30,313.88, 41,821.56 and 18,978.68

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Solution

The fourth proportional to 30,313.88, 41,821.56 and 18,978.68 is: 26,183.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,313.88 : 41,821.56 = 18,978.68 : x
  2. Step 2: Convert to fraction form
    30,313.88/41,821.56 = 18,978.68/x
  3. Step 3: Cross multiply
    30,313.88x = 41,821.56 × 18,978.68
  4. Step 4: Simplify right side
    30,313.88x = 793,718,004.34
  5. Step 5: Solve for x
    x = 793,718,004.34/30,313.88
  6. Step 6: Final answer
    x = 26,183.32

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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.