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Finding the Fourth Proportional to 8,666.96, 12,996.84 and 3,118.64

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Solution

The fourth proportional to 8,666.96, 12,996.84 and 3,118.64 is: 4,676.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.96 : 12,996.84 = 3,118.64 : x
  2. Step 2: Convert to fraction form
    8,666.96/12,996.84 = 3,118.64/x
  3. Step 3: Cross multiply
    8,666.96x = 12,996.84 × 3,118.64
  4. Step 4: Simplify right side
    8,666.96x = 40,532,465.10
  5. Step 5: Solve for x
    x = 40,532,465.10/8,666.96
  6. Step 6: Final answer
    x = 4,676.66

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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.