Home / 20,573.82-28,391.87-11,142.38

Finding the Fourth Proportional to 20,573.82, 28,391.87 and 11,142.38

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Solution

The fourth proportional to 20,573.82, 28,391.87 and 11,142.38 is: 15,376.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,573.82 : 28,391.87 = 11,142.38 : x
  2. Step 2: Convert to fraction form
    20,573.82/28,391.87 = 11,142.38/x
  3. Step 3: Cross multiply
    20,573.82x = 28,391.87 × 11,142.38
  4. Step 4: Simplify right side
    20,573.82x = 316,353,004.45
  5. Step 5: Solve for x
    x = 316,353,004.45/20,573.82
  6. Step 6: Final answer
    x = 15,376.48

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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.