Home / 20,776.05-31,102.65-13,358.52

Finding the Fourth Proportional to 20,776.05, 31,102.65 and 13,358.52

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Solution

The fourth proportional to 20,776.05, 31,102.65 and 13,358.52 is: 19,998.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.05 : 31,102.65 = 13,358.52 : x
  2. Step 2: Convert to fraction form
    20,776.05/31,102.65 = 13,358.52/x
  3. Step 3: Cross multiply
    20,776.05x = 31,102.65 × 13,358.52
  4. Step 4: Simplify right side
    20,776.05x = 415,485,372.08
  5. Step 5: Solve for x
    x = 415,485,372.08/20,776.05
  6. Step 6: Final answer
    x = 19,998.29

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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.