Home / 20,930.99-31,410.45-7,784.69

Finding the Fourth Proportional to 20,930.99, 31,410.45 and 7,784.69

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Solution

The fourth proportional to 20,930.99, 31,410.45 and 7,784.69 is: 11,682.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.99 : 31,410.45 = 7,784.69 : x
  2. Step 2: Convert to fraction form
    20,930.99/31,410.45 = 7,784.69/x
  3. Step 3: Cross multiply
    20,930.99x = 31,410.45 × 7,784.69
  4. Step 4: Simplify right side
    20,930.99x = 244,520,458.96
  5. Step 5: Solve for x
    x = 244,520,458.96/20,930.99
  6. Step 6: Final answer
    x = 11,682.22

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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.