Home / 20,741.40-31,112.21-5,159.02

Finding the Fourth Proportional to 20,741.40, 31,112.21 and 5,159.02

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Solution

The fourth proportional to 20,741.40, 31,112.21 and 5,159.02 is: 7,738.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,741.40 : 31,112.21 = 5,159.02 : x
  2. Step 2: Convert to fraction form
    20,741.40/31,112.21 = 5,159.02/x
  3. Step 3: Cross multiply
    20,741.40x = 31,112.21 × 5,159.02
  4. Step 4: Simplify right side
    20,741.40x = 160,508,513.63
  5. Step 5: Solve for x
    x = 160,508,513.63/20,741.40
  6. Step 6: Final answer
    x = 7,738.56

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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.