Home / 20,871.96-31,290.66-10,495.32

Finding the Fourth Proportional to 20,871.96, 31,290.66 and 10,495.32

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Solution

The fourth proportional to 20,871.96, 31,290.66 and 10,495.32 is: 15,734.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.96 : 31,290.66 = 10,495.32 : x
  2. Step 2: Convert to fraction form
    20,871.96/31,290.66 = 10,495.32/x
  3. Step 3: Cross multiply
    20,871.96x = 31,290.66 × 10,495.32
  4. Step 4: Simplify right side
    20,871.96x = 328,405,489.71
  5. Step 5: Solve for x
    x = 328,405,489.71/20,871.96
  6. Step 6: Final answer
    x = 15,734.29

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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.