Home / 13,828.20-20,742.30-9,940.20

Finding the Fourth Proportional to 13,828.20, 20,742.30 and 9,940.20

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Solution

The fourth proportional to 13,828.20, 20,742.30 and 9,940.20 is: 14,910.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,828.20 : 20,742.30 = 9,940.20 : x
  2. Step 2: Convert to fraction form
    13,828.20/20,742.30 = 9,940.20/x
  3. Step 3: Cross multiply
    13,828.20x = 20,742.30 × 9,940.20
  4. Step 4: Simplify right side
    13,828.20x = 206,182,610.46
  5. Step 5: Solve for x
    x = 206,182,610.46/13,828.20
  6. Step 6: Final answer
    x = 14,910.30

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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.