Home / 20,419.24-28,181.10-12,461.80

Finding the Fourth Proportional to 20,419.24, 28,181.10 and 12,461.80

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Solution

The fourth proportional to 20,419.24, 28,181.10 and 12,461.80 is: 17,198.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.24 : 28,181.10 = 12,461.80 : x
  2. Step 2: Convert to fraction form
    20,419.24/28,181.10 = 12,461.80/x
  3. Step 3: Cross multiply
    20,419.24x = 28,181.10 × 12,461.80
  4. Step 4: Simplify right side
    20,419.24x = 351,187,231.98
  5. Step 5: Solve for x
    x = 351,187,231.98/20,419.24
  6. Step 6: Final answer
    x = 17,198.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.