Home / 20,708.81-31,051.37-9,609.79

Finding the Fourth Proportional to 20,708.81, 31,051.37 and 9,609.79

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Solution

The fourth proportional to 20,708.81, 31,051.37 and 9,609.79 is: 14,409.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.81 : 31,051.37 = 9,609.79 : x
  2. Step 2: Convert to fraction form
    20,708.81/31,051.37 = 9,609.79/x
  3. Step 3: Cross multiply
    20,708.81x = 31,051.37 × 9,609.79
  4. Step 4: Simplify right side
    20,708.81x = 298,397,091.31
  5. Step 5: Solve for x
    x = 298,397,091.31/20,708.81
  6. Step 6: Final answer
    x = 14,409.18

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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.