Home / 20,842.56-31,236.72-15,894

Finding the Fourth Proportional to 20,842.56, 31,236.72 and 15,894

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Solution

The fourth proportional to 20,842.56, 31,236.72 and 15,894 is: 23,820.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,842.56 : 31,236.72 = 15,894 : x
  2. Step 2: Convert to fraction form
    20,842.56/31,236.72 = 15,894/x
  3. Step 3: Cross multiply
    20,842.56x = 31,236.72 × 15,894
  4. Step 4: Simplify right side
    20,842.56x = 496,476,427.68
  5. Step 5: Solve for x
    x = 496,476,427.68/20,842.56
  6. Step 6: Final answer
    x = 23,820.32

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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.