Home / 5,621.80-8,420.55-3,434.80

Finding the Fourth Proportional to 5,621.80, 8,420.55 and 3,434.80

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Solution

The fourth proportional to 5,621.80, 8,420.55 and 3,434.80 is: 5,144.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,621.80 : 8,420.55 = 3,434.80 : x
  2. Step 2: Convert to fraction form
    5,621.80/8,420.55 = 3,434.80/x
  3. Step 3: Cross multiply
    5,621.80x = 8,420.55 × 3,434.80
  4. Step 4: Simplify right side
    5,621.80x = 28,922,905.14
  5. Step 5: Solve for x
    x = 28,922,905.14/5,621.80
  6. Step 6: Final answer
    x = 5,144.78

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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.