Home / 18,910.40-28,381.80-8,396.60

Finding the Fourth Proportional to 18,910.40, 28,381.80 and 8,396.60

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Solution

The fourth proportional to 18,910.40, 28,381.80 and 8,396.60 is: 12,602.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,910.40 : 28,381.80 = 8,396.60 : x
  2. Step 2: Convert to fraction form
    18,910.40/28,381.80 = 8,396.60/x
  3. Step 3: Cross multiply
    18,910.40x = 28,381.80 × 8,396.60
  4. Step 4: Simplify right side
    18,910.40x = 238,310,621.88
  5. Step 5: Solve for x
    x = 238,310,621.88/18,910.40
  6. Step 6: Final answer
    x = 12,602.09

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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.