Home / 19,481.40-29,178.90-7,788.60

Finding the Fourth Proportional to 19,481.40, 29,178.90 and 7,788.60

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Solution

The fourth proportional to 19,481.40, 29,178.90 and 7,788.60 is: 11,665.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,481.40 : 29,178.90 = 7,788.60 : x
  2. Step 2: Convert to fraction form
    19,481.40/29,178.90 = 7,788.60/x
  3. Step 3: Cross multiply
    19,481.40x = 29,178.90 × 7,788.60
  4. Step 4: Simplify right side
    19,481.40x = 227,262,780.54
  5. Step 5: Solve for x
    x = 227,262,780.54/19,481.40
  6. Step 6: Final answer
    x = 11,665.63

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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.