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Finding the Fourth Proportional to 8,507.79, 11,739.96 and 7,880.85

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Solution

The fourth proportional to 8,507.79, 11,739.96 and 7,880.85 is: 10,874.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,507.79 : 11,739.96 = 7,880.85 : x
  2. Step 2: Convert to fraction form
    8,507.79/11,739.96 = 7,880.85/x
  3. Step 3: Cross multiply
    8,507.79x = 11,739.96 × 7,880.85
  4. Step 4: Simplify right side
    8,507.79x = 92,520,863.77
  5. Step 5: Solve for x
    x = 92,520,863.77/8,507.79
  6. Step 6: Final answer
    x = 10,874.84

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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.