Home / 8,480.40-12,721.96-4,098.20

Finding the Fourth Proportional to 8,480.40, 12,721.96 and 4,098.20

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Solution

The fourth proportional to 8,480.40, 12,721.96 and 4,098.20 is: 6,147.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,480.40 : 12,721.96 = 4,098.20 : x
  2. Step 2: Convert to fraction form
    8,480.40/12,721.96 = 4,098.20/x
  3. Step 3: Cross multiply
    8,480.40x = 12,721.96 × 4,098.20
  4. Step 4: Simplify right side
    8,480.40x = 52,137,136.47
  5. Step 5: Solve for x
    x = 52,137,136.47/8,480.40
  6. Step 6: Final answer
    x = 6,147.96

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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.