Home / 12,982.20-19,486.10-6,415.80

Finding the Fourth Proportional to 12,982.20, 19,486.10 and 6,415.80

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Solution

The fourth proportional to 12,982.20, 19,486.10 and 6,415.80 is: 9,630.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,982.20 : 19,486.10 = 6,415.80 : x
  2. Step 2: Convert to fraction form
    12,982.20/19,486.10 = 6,415.80/x
  3. Step 3: Cross multiply
    12,982.20x = 19,486.10 × 6,415.80
  4. Step 4: Simplify right side
    12,982.20x = 125,018,920.38
  5. Step 5: Solve for x
    x = 125,018,920.38/12,982.20
  6. Step 6: Final answer
    x = 9,630.03

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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.