Home / 20,828.78-31,243.14-6,788.79

Finding the Fourth Proportional to 20,828.78, 31,243.14 and 6,788.79

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Solution

The fourth proportional to 20,828.78, 31,243.14 and 6,788.79 is: 10,183.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.78 : 31,243.14 = 6,788.79 : x
  2. Step 2: Convert to fraction form
    20,828.78/31,243.14 = 6,788.79/x
  3. Step 3: Cross multiply
    20,828.78x = 31,243.14 × 6,788.79
  4. Step 4: Simplify right side
    20,828.78x = 212,103,116.40
  5. Step 5: Solve for x
    x = 212,103,116.40/20,828.78
  6. Step 6: Final answer
    x = 10,183.18

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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.