Home / 8,380.40-12,556.20-5,298.80

Finding the Fourth Proportional to 8,380.40, 12,556.20 and 5,298.80

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Solution

The fourth proportional to 8,380.40, 12,556.20 and 5,298.80 is: 7,939.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,380.40 : 12,556.20 = 5,298.80 : x
  2. Step 2: Convert to fraction form
    8,380.40/12,556.20 = 5,298.80/x
  3. Step 3: Cross multiply
    8,380.40x = 12,556.20 × 5,298.80
  4. Step 4: Simplify right side
    8,380.40x = 66,532,792.56
  5. Step 5: Solve for x
    x = 66,532,792.56/8,380.40
  6. Step 6: Final answer
    x = 7,939.10

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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.