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Finding the Fourth Proportional to 8,451.64, 12,679.53 and 2,905.06

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Solution

The fourth proportional to 8,451.64, 12,679.53 and 2,905.06 is: 4,358.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,451.64 : 12,679.53 = 2,905.06 : x
  2. Step 2: Convert to fraction form
    8,451.64/12,679.53 = 2,905.06/x
  3. Step 3: Cross multiply
    8,451.64x = 12,679.53 × 2,905.06
  4. Step 4: Simplify right side
    8,451.64x = 36,834,780.90
  5. Step 5: Solve for x
    x = 36,834,780.90/8,451.64
  6. Step 6: Final answer
    x = 4,358.30

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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.