Home / 13,386.20-20,071.30-8,195.80

Finding the Fourth Proportional to 13,386.20, 20,071.30 and 8,195.80

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Solution

The fourth proportional to 13,386.20, 20,071.30 and 8,195.80 is: 12,288.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,386.20 : 20,071.30 = 8,195.80 : x
  2. Step 2: Convert to fraction form
    13,386.20/20,071.30 = 8,195.80/x
  3. Step 3: Cross multiply
    13,386.20x = 20,071.30 × 8,195.80
  4. Step 4: Simplify right side
    13,386.20x = 164,500,360.54
  5. Step 5: Solve for x
    x = 164,500,360.54/13,386.20
  6. Step 6: Final answer
    x = 12,288.80

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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.