Home / 12,319.12-18,478.42-3,999.12

Finding the Fourth Proportional to 12,319.12, 18,478.42 and 3,999.12

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Solution

The fourth proportional to 12,319.12, 18,478.42 and 3,999.12 is: 5,998.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,319.12 : 18,478.42 = 3,999.12 : x
  2. Step 2: Convert to fraction form
    12,319.12/18,478.42 = 3,999.12/x
  3. Step 3: Cross multiply
    12,319.12x = 18,478.42 × 3,999.12
  4. Step 4: Simplify right side
    12,319.12x = 73,897,418.99
  5. Step 5: Solve for x
    x = 73,897,418.99/12,319.12
  6. Step 6: Final answer
    x = 5,998.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.