Home / 12,986.20-19,492.10-6,419.80

Finding the Fourth Proportional to 12,986.20, 19,492.10 and 6,419.80

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Solution

The fourth proportional to 12,986.20, 19,492.10 and 6,419.80 is: 9,636.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,986.20 : 19,492.10 = 6,419.80 : x
  2. Step 2: Convert to fraction form
    12,986.20/19,492.10 = 6,419.80/x
  3. Step 3: Cross multiply
    12,986.20x = 19,492.10 × 6,419.80
  4. Step 4: Simplify right side
    12,986.20x = 125,135,383.58
  5. Step 5: Solve for x
    x = 125,135,383.58/12,986.20
  6. Step 6: Final answer
    x = 9,636.03

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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.