Home / 13,676.40-20,514.60-8,485.20

Finding the Fourth Proportional to 13,676.40, 20,514.60 and 8,485.20

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Solution

The fourth proportional to 13,676.40, 20,514.60 and 8,485.20 is: 12,727.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,676.40 : 20,514.60 = 8,485.20 : x
  2. Step 2: Convert to fraction form
    13,676.40/20,514.60 = 8,485.20/x
  3. Step 3: Cross multiply
    13,676.40x = 20,514.60 × 8,485.20
  4. Step 4: Simplify right side
    13,676.40x = 174,070,483.92
  5. Step 5: Solve for x
    x = 174,070,483.92/13,676.40
  6. Step 6: Final answer
    x = 12,727.80

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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.