Home / 20,923.75-31,383.60-7,776.10

Finding the Fourth Proportional to 20,923.75, 31,383.60 and 7,776.10

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Solution

The fourth proportional to 20,923.75, 31,383.60 and 7,776.10 is: 11,663.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,923.75 : 31,383.60 = 7,776.10 : x
  2. Step 2: Convert to fraction form
    20,923.75/31,383.60 = 7,776.10/x
  3. Step 3: Cross multiply
    20,923.75x = 31,383.60 × 7,776.10
  4. Step 4: Simplify right side
    20,923.75x = 244,042,011.96
  5. Step 5: Solve for x
    x = 244,042,011.96/20,923.75
  6. Step 6: Final answer
    x = 11,663.40

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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.