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Finding the Fourth Proportional to 20,467, 28,236.36 and 12,910.51

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Solution

The fourth proportional to 20,467, 28,236.36 and 12,910.51 is: 17,811.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,467 : 28,236.36 = 12,910.51 : x
  2. Step 2: Convert to fraction form
    20,467/28,236.36 = 12,910.51/x
  3. Step 3: Cross multiply
    20,467x = 28,236.36 × 12,910.51
  4. Step 4: Simplify right side
    20,467x = 364,545,808.14
  5. Step 5: Solve for x
    x = 364,545,808.14/20,467
  6. Step 6: Final answer
    x = 17,811.39

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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.