Home / 21,974.88-30,327.78-12,543.45

Finding the Fourth Proportional to 21,974.88, 30,327.78 and 12,543.45

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Solution

The fourth proportional to 21,974.88, 30,327.78 and 12,543.45 is: 17,311.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,974.88 : 30,327.78 = 12,543.45 : x
  2. Step 2: Convert to fraction form
    21,974.88/30,327.78 = 12,543.45/x
  3. Step 3: Cross multiply
    21,974.88x = 30,327.78 × 12,543.45
  4. Step 4: Simplify right side
    21,974.88x = 380,414,992.04
  5. Step 5: Solve for x
    x = 380,414,992.04/21,974.88
  6. Step 6: Final answer
    x = 17,311.36

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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.