Home / 12,399.13-18,589.78-5,821.66

Finding the Fourth Proportional to 12,399.13, 18,589.78 and 5,821.66

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Solution

The fourth proportional to 12,399.13, 18,589.78 and 5,821.66 is: 8,728.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,399.13 : 18,589.78 = 5,821.66 : x
  2. Step 2: Convert to fraction form
    12,399.13/18,589.78 = 5,821.66/x
  3. Step 3: Cross multiply
    12,399.13x = 18,589.78 × 5,821.66
  4. Step 4: Simplify right side
    12,399.13x = 108,223,378.63
  5. Step 5: Solve for x
    x = 108,223,378.63/12,399.13
  6. Step 6: Final answer
    x = 8,728.30

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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.