Home / 20,843.56-28,764.12-11,412.72

Finding the Fourth Proportional to 20,843.56, 28,764.12 and 11,412.72

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Solution

The fourth proportional to 20,843.56, 28,764.12 and 11,412.72 is: 15,749.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,843.56 : 28,764.12 = 11,412.72 : x
  2. Step 2: Convert to fraction form
    20,843.56/28,764.12 = 11,412.72/x
  3. Step 3: Cross multiply
    20,843.56x = 28,764.12 × 11,412.72
  4. Step 4: Simplify right side
    20,843.56x = 328,276,847.61
  5. Step 5: Solve for x
    x = 328,276,847.61/20,843.56
  6. Step 6: Final answer
    x = 15,749.56

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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.