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Finding the Fourth Proportional to 8,708.10, 12,020.85 and 5,879.30

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Solution

The fourth proportional to 8,708.10, 12,020.85 and 5,879.30 is: 8,115.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,708.10 : 12,020.85 = 5,879.30 : x
  2. Step 2: Convert to fraction form
    8,708.10/12,020.85 = 5,879.30/x
  3. Step 3: Cross multiply
    8,708.10x = 12,020.85 × 5,879.30
  4. Step 4: Simplify right side
    8,708.10x = 70,674,183.41
  5. Step 5: Solve for x
    x = 70,674,183.41/8,708.10
  6. Step 6: Final answer
    x = 8,115.92

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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.