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Finding the Fourth Proportional to 8,486.64, 12,729.84 and 4,104.48

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Solution

The fourth proportional to 8,486.64, 12,729.84 and 4,104.48 is: 6,156.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,486.64 : 12,729.84 = 4,104.48 : x
  2. Step 2: Convert to fraction form
    8,486.64/12,729.84 = 4,104.48/x
  3. Step 3: Cross multiply
    8,486.64x = 12,729.84 × 4,104.48
  4. Step 4: Simplify right side
    8,486.64x = 52,249,373.68
  5. Step 5: Solve for x
    x = 52,249,373.68/8,486.64
  6. Step 6: Final answer
    x = 6,156.66

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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.