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Finding the Fourth Proportional to 8,420.88, 12,624.12 and 3,230.48

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Solution

The fourth proportional to 8,420.88, 12,624.12 and 3,230.48 is: 4,842.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.88 : 12,624.12 = 3,230.48 : x
  2. Step 2: Convert to fraction form
    8,420.88/12,624.12 = 3,230.48/x
  3. Step 3: Cross multiply
    8,420.88x = 12,624.12 × 3,230.48
  4. Step 4: Simplify right side
    8,420.88x = 40,781,967.18
  5. Step 5: Solve for x
    x = 40,781,967.18/8,420.88
  6. Step 6: Final answer
    x = 4,842.96

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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.