Home / 12,679.12-19,018.68-6,872.50

Finding the Fourth Proportional to 12,679.12, 19,018.68 and 6,872.50

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Solution

The fourth proportional to 12,679.12, 19,018.68 and 6,872.50 is: 10,308.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.12 : 19,018.68 = 6,872.50 : x
  2. Step 2: Convert to fraction form
    12,679.12/19,018.68 = 6,872.50/x
  3. Step 3: Cross multiply
    12,679.12x = 19,018.68 × 6,872.50
  4. Step 4: Simplify right side
    12,679.12x = 130,705,878.30
  5. Step 5: Solve for x
    x = 130,705,878.30/12,679.12
  6. Step 6: Final answer
    x = 10,308.75

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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.