Home / 7,115.44-10,671.70-1,920.10

Finding the Fourth Proportional to 7,115.44, 10,671.70 and 1,920.10

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Solution

The fourth proportional to 7,115.44, 10,671.70 and 1,920.10 is: 2,879.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.44 : 10,671.70 = 1,920.10 : x
  2. Step 2: Convert to fraction form
    7,115.44/10,671.70 = 1,920.10/x
  3. Step 3: Cross multiply
    7,115.44x = 10,671.70 × 1,920.10
  4. Step 4: Simplify right side
    7,115.44x = 20,490,731.17
  5. Step 5: Solve for x
    x = 20,490,731.17/7,115.44
  6. Step 6: Final answer
    x = 2,879.76

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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.