Home / 13,986.30-20,979.45-12,863.10

Finding the Fourth Proportional to 13,986.30, 20,979.45 and 12,863.10

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Solution

The fourth proportional to 13,986.30, 20,979.45 and 12,863.10 is: 19,294.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,986.30 : 20,979.45 = 12,863.10 : x
  2. Step 2: Convert to fraction form
    13,986.30/20,979.45 = 12,863.10/x
  3. Step 3: Cross multiply
    13,986.30x = 20,979.45 × 12,863.10
  4. Step 4: Simplify right side
    13,986.30x = 269,860,763.30
  5. Step 5: Solve for x
    x = 269,860,763.30/13,986.30
  6. Step 6: Final answer
    x = 19,294.65

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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.