Home / 11,479.35-15,840.44-6,443.78

Finding the Fourth Proportional to 11,479.35, 15,840.44 and 6,443.78

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Solution

The fourth proportional to 11,479.35, 15,840.44 and 6,443.78 is: 8,891.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,479.35 : 15,840.44 = 6,443.78 : x
  2. Step 2: Convert to fraction form
    11,479.35/15,840.44 = 6,443.78/x
  3. Step 3: Cross multiply
    11,479.35x = 15,840.44 × 6,443.78
  4. Step 4: Simplify right side
    11,479.35x = 102,072,310.46
  5. Step 5: Solve for x
    x = 102,072,310.46/11,479.35
  6. Step 6: Final answer
    x = 8,891.82

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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.