Home / 8,405.13-12,611.94-3,478.30

Finding the Fourth Proportional to 8,405.13, 12,611.94 and 3,478.30

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Solution

The fourth proportional to 8,405.13, 12,611.94 and 3,478.30 is: 5,219.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,405.13 : 12,611.94 = 3,478.30 : x
  2. Step 2: Convert to fraction form
    8,405.13/12,611.94 = 3,478.30/x
  3. Step 3: Cross multiply
    8,405.13x = 12,611.94 × 3,478.30
  4. Step 4: Simplify right side
    8,405.13x = 43,868,110.90
  5. Step 5: Solve for x
    x = 43,868,110.90/8,405.13
  6. Step 6: Final answer
    x = 5,219.21

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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.