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Finding the Fourth Proportional to 8,451.76, 12,679.12 and 2,905.68

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Solution

The fourth proportional to 8,451.76, 12,679.12 and 2,905.68 is: 4,359.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,451.76 : 12,679.12 = 2,905.68 : x
  2. Step 2: Convert to fraction form
    8,451.76/12,679.12 = 2,905.68/x
  3. Step 3: Cross multiply
    8,451.76x = 12,679.12 × 2,905.68
  4. Step 4: Simplify right side
    8,451.76x = 36,841,465.40
  5. Step 5: Solve for x
    x = 36,841,465.40/8,451.76
  6. Step 6: Final answer
    x = 4,359.03

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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.