Home / 12,183.12-18,271.80-5,605.20

Finding the Fourth Proportional to 12,183.12, 18,271.80 and 5,605.20

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Solution

The fourth proportional to 12,183.12, 18,271.80 and 5,605.20 is: 8,406.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,183.12 : 18,271.80 = 5,605.20 : x
  2. Step 2: Convert to fraction form
    12,183.12/18,271.80 = 5,605.20/x
  3. Step 3: Cross multiply
    12,183.12x = 18,271.80 × 5,605.20
  4. Step 4: Simplify right side
    12,183.12x = 102,417,093.36
  5. Step 5: Solve for x
    x = 102,417,093.36/12,183.12
  6. Step 6: Final answer
    x = 8,406.47

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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.