Home / 20,774.95-31,126.97-11,422.80

Finding the Fourth Proportional to 20,774.95, 31,126.97 and 11,422.80

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Solution

The fourth proportional to 20,774.95, 31,126.97 and 11,422.80 is: 17,114.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,774.95 : 31,126.97 = 11,422.80 : x
  2. Step 2: Convert to fraction form
    20,774.95/31,126.97 = 11,422.80/x
  3. Step 3: Cross multiply
    20,774.95x = 31,126.97 × 11,422.80
  4. Step 4: Simplify right side
    20,774.95x = 355,557,181.47
  5. Step 5: Solve for x
    x = 355,557,181.47/20,774.95
  6. Step 6: Final answer
    x = 17,114.71

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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.