Home / 20,832.36-28,748.82-12,872.76

Finding the Fourth Proportional to 20,832.36, 28,748.82 and 12,872.76

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Solution

The fourth proportional to 20,832.36, 28,748.82 and 12,872.76 is: 17,764.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,832.36 : 28,748.82 = 12,872.76 : x
  2. Step 2: Convert to fraction form
    20,832.36/28,748.82 = 12,872.76/x
  3. Step 3: Cross multiply
    20,832.36x = 28,748.82 × 12,872.76
  4. Step 4: Simplify right side
    20,832.36x = 370,076,660.14
  5. Step 5: Solve for x
    x = 370,076,660.14/20,832.36
  6. Step 6: Final answer
    x = 17,764.51

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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.