Home / 20,556.12-28,366.02-12,171

Finding the Fourth Proportional to 20,556.12, 28,366.02 and 12,171

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Solution

The fourth proportional to 20,556.12, 28,366.02 and 12,171 is: 16,795.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,556.12 : 28,366.02 = 12,171 : x
  2. Step 2: Convert to fraction form
    20,556.12/28,366.02 = 12,171/x
  3. Step 3: Cross multiply
    20,556.12x = 28,366.02 × 12,171
  4. Step 4: Simplify right side
    20,556.12x = 345,242,829.42
  5. Step 5: Solve for x
    x = 345,242,829.42/20,556.12
  6. Step 6: Final answer
    x = 16,795.14

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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.