Home / 11,144.22-15,379.32-6,428.80

Finding the Fourth Proportional to 11,144.22, 15,379.32 and 6,428.80

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Solution

The fourth proportional to 11,144.22, 15,379.32 and 6,428.80 is: 8,871.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,144.22 : 15,379.32 = 6,428.80 : x
  2. Step 2: Convert to fraction form
    11,144.22/15,379.32 = 6,428.80/x
  3. Step 3: Cross multiply
    11,144.22x = 15,379.32 × 6,428.80
  4. Step 4: Simplify right side
    11,144.22x = 98,870,572.42
  5. Step 5: Solve for x
    x = 98,870,572.42/11,144.22
  6. Step 6: Final answer
    x = 8,871.91

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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.