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Finding the Fourth Proportional to 7,879.74, 10,874.10 and 4,342.95

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Solution

The fourth proportional to 7,879.74, 10,874.10 and 4,342.95 is: 5,993.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.74 : 10,874.10 = 4,342.95 : x
  2. Step 2: Convert to fraction form
    7,879.74/10,874.10 = 4,342.95/x
  3. Step 3: Cross multiply
    7,879.74x = 10,874.10 × 4,342.95
  4. Step 4: Simplify right side
    7,879.74x = 47,225,682.82
  5. Step 5: Solve for x
    x = 47,225,682.82/7,879.74
  6. Step 6: Final answer
    x = 5,993.30

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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.