Home / 20,791.71-31,176.36-9,091.26

Finding the Fourth Proportional to 20,791.71, 31,176.36 and 9,091.26

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Solution

The fourth proportional to 20,791.71, 31,176.36 and 9,091.26 is: 13,631.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,791.71 : 31,176.36 = 9,091.26 : x
  2. Step 2: Convert to fraction form
    20,791.71/31,176.36 = 9,091.26/x
  3. Step 3: Cross multiply
    20,791.71x = 31,176.36 × 9,091.26
  4. Step 4: Simplify right side
    20,791.71x = 283,432,394.61
  5. Step 5: Solve for x
    x = 283,432,394.61/20,791.71
  6. Step 6: Final answer
    x = 13,631.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.