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Finding the Fourth Proportional to 8,651.64, 12,977.55 and 2,808.30

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Solution

The fourth proportional to 8,651.64, 12,977.55 and 2,808.30 is: 4,212.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,651.64 : 12,977.55 = 2,808.30 : x
  2. Step 2: Convert to fraction form
    8,651.64/12,977.55 = 2,808.30/x
  3. Step 3: Cross multiply
    8,651.64x = 12,977.55 × 2,808.30
  4. Step 4: Simplify right side
    8,651.64x = 36,444,853.67
  5. Step 5: Solve for x
    x = 36,444,853.67/8,651.64
  6. Step 6: Final answer
    x = 4,212.48

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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.