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Finding the Fourth Proportional to 8,679.94, 13,011.66 and 7,884.40

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Solution

The fourth proportional to 8,679.94, 13,011.66 and 7,884.40 is: 11,819.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.94 : 13,011.66 = 7,884.40 : x
  2. Step 2: Convert to fraction form
    8,679.94/13,011.66 = 7,884.40/x
  3. Step 3: Cross multiply
    8,679.94x = 13,011.66 × 7,884.40
  4. Step 4: Simplify right side
    8,679.94x = 102,589,132.10
  5. Step 5: Solve for x
    x = 102,589,132.10/8,679.94
  6. Step 6: Final answer
    x = 11,819.11

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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.