Home / 20,800.62-28,714.37-13,257.27

Finding the Fourth Proportional to 20,800.62, 28,714.37 and 13,257.27

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Solution

The fourth proportional to 20,800.62, 28,714.37 and 13,257.27 is: 18,301.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.62 : 28,714.37 = 13,257.27 : x
  2. Step 2: Convert to fraction form
    20,800.62/28,714.37 = 13,257.27/x
  3. Step 3: Cross multiply
    20,800.62x = 28,714.37 × 13,257.27
  4. Step 4: Simplify right side
    20,800.62x = 380,674,089.68
  5. Step 5: Solve for x
    x = 380,674,089.68/20,800.62
  6. Step 6: Final answer
    x = 18,301.09

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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.