Home / 21,110.56-31,650.48-13,722.40

Finding the Fourth Proportional to 21,110.56, 31,650.48 and 13,722.40

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Solution

The fourth proportional to 21,110.56, 31,650.48 and 13,722.40 is: 20,573.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.56 : 31,650.48 = 13,722.40 : x
  2. Step 2: Convert to fraction form
    21,110.56/31,650.48 = 13,722.40/x
  3. Step 3: Cross multiply
    21,110.56x = 31,650.48 × 13,722.40
  4. Step 4: Simplify right side
    21,110.56x = 434,320,546.75
  5. Step 5: Solve for x
    x = 434,320,546.75/21,110.56
  6. Step 6: Final answer
    x = 20,573.62

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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.