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Finding the Fourth Proportional to 8,420.12, 12,630.16 and 2,576.72

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Solution

The fourth proportional to 8,420.12, 12,630.16 and 2,576.72 is: 3,865.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.12 : 12,630.16 = 2,576.72 : x
  2. Step 2: Convert to fraction form
    8,420.12/12,630.16 = 2,576.72/x
  3. Step 3: Cross multiply
    8,420.12x = 12,630.16 × 2,576.72
  4. Step 4: Simplify right side
    8,420.12x = 32,544,385.88
  5. Step 5: Solve for x
    x = 32,544,385.88/8,420.12
  6. Step 6: Final answer
    x = 3,865.07

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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.