Home / 12,655.13-18,976.32-4,218.65

Finding the Fourth Proportional to 12,655.13, 18,976.32 and 4,218.65

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Solution

The fourth proportional to 12,655.13, 18,976.32 and 4,218.65 is: 6,325.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,655.13 : 18,976.32 = 4,218.65 : x
  2. Step 2: Convert to fraction form
    12,655.13/18,976.32 = 4,218.65/x
  3. Step 3: Cross multiply
    12,655.13x = 18,976.32 × 4,218.65
  4. Step 4: Simplify right side
    12,655.13x = 80,054,452.37
  5. Step 5: Solve for x
    x = 80,054,452.37/12,655.13
  6. Step 6: Final answer
    x = 6,325.85

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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.