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Finding the Fourth Proportional to 8,389.91, 11,582.60 and 5,879.72

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Solution

The fourth proportional to 8,389.91, 11,582.60 and 5,879.72 is: 8,117.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,389.91 : 11,582.60 = 5,879.72 : x
  2. Step 2: Convert to fraction form
    8,389.91/11,582.60 = 5,879.72/x
  3. Step 3: Cross multiply
    8,389.91x = 11,582.60 × 5,879.72
  4. Step 4: Simplify right side
    8,389.91x = 68,102,357.56
  5. Step 5: Solve for x
    x = 68,102,357.56/8,389.91
  6. Step 6: Final answer
    x = 8,117.18

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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.