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Finding the Fourth Proportional to 7,879.41, 11,810.61 and 3,490.83

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Solution

The fourth proportional to 7,879.41, 11,810.61 and 3,490.83 is: 5,232.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.41 : 11,810.61 = 3,490.83 : x
  2. Step 2: Convert to fraction form
    7,879.41/11,810.61 = 3,490.83/x
  3. Step 3: Cross multiply
    7,879.41x = 11,810.61 × 3,490.83
  4. Step 4: Simplify right side
    7,879.41x = 41,228,831.71
  5. Step 5: Solve for x
    x = 41,228,831.71/7,879.41
  6. Step 6: Final answer
    x = 5,232.48

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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.