Home / 20,741.73-31,112.70-5,159.35

Finding the Fourth Proportional to 20,741.73, 31,112.70 and 5,159.35

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Solution

The fourth proportional to 20,741.73, 31,112.70 and 5,159.35 is: 7,739.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,741.73 : 31,112.70 = 5,159.35 : x
  2. Step 2: Convert to fraction form
    20,741.73/31,112.70 = 5,159.35/x
  3. Step 3: Cross multiply
    20,741.73x = 31,112.70 × 5,159.35
  4. Step 4: Simplify right side
    20,741.73x = 160,521,308.75
  5. Step 5: Solve for x
    x = 160,521,308.75/20,741.73
  6. Step 6: Final answer
    x = 7,739.05

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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.