Home / 20,919-31,387.04-11,055.64

Finding the Fourth Proportional to 20,919, 31,387.04 and 11,055.64

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Solution

The fourth proportional to 20,919, 31,387.04 and 11,055.64 is: 16,587.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919 : 31,387.04 = 11,055.64 : x
  2. Step 2: Convert to fraction form
    20,919/31,387.04 = 11,055.64/x
  3. Step 3: Cross multiply
    20,919x = 31,387.04 × 11,055.64
  4. Step 4: Simplify right side
    20,919x = 347,003,814.91
  5. Step 5: Solve for x
    x = 347,003,814.91/20,919
  6. Step 6: Final answer
    x = 16,587.97

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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.