Home / 13,478.20-20,217.30-8,207.80

Finding the Fourth Proportional to 13,478.20, 20,217.30 and 8,207.80

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Solution

The fourth proportional to 13,478.20, 20,217.30 and 8,207.80 is: 12,311.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,478.20 : 20,217.30 = 8,207.80 : x
  2. Step 2: Convert to fraction form
    13,478.20/20,217.30 = 8,207.80/x
  3. Step 3: Cross multiply
    13,478.20x = 20,217.30 × 8,207.80
  4. Step 4: Simplify right side
    13,478.20x = 165,939,554.94
  5. Step 5: Solve for x
    x = 165,939,554.94/13,478.20
  6. Step 6: Final answer
    x = 12,311.70

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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.