Home / 7,115.43-10,671.69-1,920.09

Finding the Fourth Proportional to 7,115.43, 10,671.69 and 1,920.09

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Solution

The fourth proportional to 7,115.43, 10,671.69 and 1,920.09 is: 2,879.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.43 : 10,671.69 = 1,920.09 : x
  2. Step 2: Convert to fraction form
    7,115.43/10,671.69 = 1,920.09/x
  3. Step 3: Cross multiply
    7,115.43x = 10,671.69 × 1,920.09
  4. Step 4: Simplify right side
    7,115.43x = 20,490,605.25
  5. Step 5: Solve for x
    x = 20,490,605.25/7,115.43
  6. Step 6: Final answer
    x = 2,879.74

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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.