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Finding the Fourth Proportional to 12,511.92, 18,771.20 and 3,746.88

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Solution

The fourth proportional to 12,511.92, 18,771.20 and 3,746.88 is: 5,621.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,511.92 : 18,771.20 = 3,746.88 : x
  2. Step 2: Convert to fraction form
    12,511.92/18,771.20 = 3,746.88/x
  3. Step 3: Cross multiply
    12,511.92x = 18,771.20 × 3,746.88
  4. Step 4: Simplify right side
    12,511.92x = 70,333,433.86
  5. Step 5: Solve for x
    x = 70,333,433.86/12,511.92
  6. Step 6: Final answer
    x = 5,621.31

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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.