Home / 28,696.32-43,038.72-7,920.96

Finding the Fourth Proportional to 28,696.32, 43,038.72 and 7,920.96

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Solution

The fourth proportional to 28,696.32, 43,038.72 and 7,920.96 is: 11,879.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,696.32 : 43,038.72 = 7,920.96 : x
  2. Step 2: Convert to fraction form
    28,696.32/43,038.72 = 7,920.96/x
  3. Step 3: Cross multiply
    28,696.32x = 43,038.72 × 7,920.96
  4. Step 4: Simplify right side
    28,696.32x = 340,907,979.57
  5. Step 5: Solve for x
    x = 340,907,979.57/28,696.32
  6. Step 6: Final answer
    x = 11,879.85

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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.