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Finding the Fourth Proportional to 8,313.76, 12,468.20 and 3,118.44

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Solution

The fourth proportional to 8,313.76, 12,468.20 and 3,118.44 is: 4,676.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,313.76 : 12,468.20 = 3,118.44 : x
  2. Step 2: Convert to fraction form
    8,313.76/12,468.20 = 3,118.44/x
  3. Step 3: Cross multiply
    8,313.76x = 12,468.20 × 3,118.44
  4. Step 4: Simplify right side
    8,313.76x = 38,881,333.61
  5. Step 5: Solve for x
    x = 38,881,333.61/8,313.76
  6. Step 6: Final answer
    x = 4,676.74

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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.