Home / 16,860.80-25,271.52-12,687.40

Finding the Fourth Proportional to 16,860.80, 25,271.52 and 12,687.40

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Solution

The fourth proportional to 16,860.80, 25,271.52 and 12,687.40 is: 19,016.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,860.80 : 25,271.52 = 12,687.40 : x
  2. Step 2: Convert to fraction form
    16,860.80/25,271.52 = 12,687.40/x
  3. Step 3: Cross multiply
    16,860.80x = 25,271.52 × 12,687.40
  4. Step 4: Simplify right side
    16,860.80x = 320,629,882.85
  5. Step 5: Solve for x
    x = 320,629,882.85/16,860.80
  6. Step 6: Final answer
    x = 19,016.29

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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.