Home / 20,986.13-28,952.18-12,486.56

Finding the Fourth Proportional to 20,986.13, 28,952.18 and 12,486.56

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Solution

The fourth proportional to 20,986.13, 28,952.18 and 12,486.56 is: 17,226.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.13 : 28,952.18 = 12,486.56 : x
  2. Step 2: Convert to fraction form
    20,986.13/28,952.18 = 12,486.56/x
  3. Step 3: Cross multiply
    20,986.13x = 28,952.18 × 12,486.56
  4. Step 4: Simplify right side
    20,986.13x = 361,512,987.94
  5. Step 5: Solve for x
    x = 361,512,987.94/20,986.13
  6. Step 6: Final answer
    x = 17,226.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.