Home / 20,431.08-28,191.42-11,476.44

Finding the Fourth Proportional to 20,431.08, 28,191.42 and 11,476.44

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Solution

The fourth proportional to 20,431.08, 28,191.42 and 11,476.44 is: 15,835.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.08 : 28,191.42 = 11,476.44 : x
  2. Step 2: Convert to fraction form
    20,431.08/28,191.42 = 11,476.44/x
  3. Step 3: Cross multiply
    20,431.08x = 28,191.42 × 11,476.44
  4. Step 4: Simplify right side
    20,431.08x = 323,537,140.14
  5. Step 5: Solve for x
    x = 323,537,140.14/20,431.08
  6. Step 6: Final answer
    x = 15,835.54

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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.