Home / 8,420.32-12,621.36-3,486.80

Finding the Fourth Proportional to 8,420.32, 12,621.36 and 3,486.80

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Solution

The fourth proportional to 8,420.32, 12,621.36 and 3,486.80 is: 5,226.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.32 : 12,621.36 = 3,486.80 : x
  2. Step 2: Convert to fraction form
    8,420.32/12,621.36 = 3,486.80/x
  3. Step 3: Cross multiply
    8,420.32x = 12,621.36 × 3,486.80
  4. Step 4: Simplify right side
    8,420.32x = 44,008,158.05
  5. Step 5: Solve for x
    x = 44,008,158.05/8,420.32
  6. Step 6: Final answer
    x = 5,226.42

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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.