Home / 20,874.31-31,325.04-9,039.64

Finding the Fourth Proportional to 20,874.31, 31,325.04 and 9,039.64

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Solution

The fourth proportional to 20,874.31, 31,325.04 and 9,039.64 is: 13,565.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,874.31 : 31,325.04 = 9,039.64 : x
  2. Step 2: Convert to fraction form
    20,874.31/31,325.04 = 9,039.64/x
  3. Step 3: Cross multiply
    20,874.31x = 31,325.04 × 9,039.64
  4. Step 4: Simplify right side
    20,874.31x = 283,167,039.39
  5. Step 5: Solve for x
    x = 283,167,039.39/20,874.31
  6. Step 6: Final answer
    x = 13,565.34

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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.