Home / 12,181.76-18,260.48-4,780.80

Finding the Fourth Proportional to 12,181.76, 18,260.48 and 4,780.80

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Solution

The fourth proportional to 12,181.76, 18,260.48 and 4,780.80 is: 7,166.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,181.76 : 18,260.48 = 4,780.80 : x
  2. Step 2: Convert to fraction form
    12,181.76/18,260.48 = 4,780.80/x
  3. Step 3: Cross multiply
    12,181.76x = 18,260.48 × 4,780.80
  4. Step 4: Simplify right side
    12,181.76x = 87,299,702.78
  5. Step 5: Solve for x
    x = 87,299,702.78/12,181.76
  6. Step 6: Final answer
    x = 7,166.43

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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.