Home / 20,667.72-31,001.16-6,627.78

Finding the Fourth Proportional to 20,667.72, 31,001.16 and 6,627.78

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Solution

The fourth proportional to 20,667.72, 31,001.16 and 6,627.78 is: 9,941.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.72 : 31,001.16 = 6,627.78 : x
  2. Step 2: Convert to fraction form
    20,667.72/31,001.16 = 6,627.78/x
  3. Step 3: Cross multiply
    20,667.72x = 31,001.16 × 6,627.78
  4. Step 4: Simplify right side
    20,667.72x = 205,468,868.22
  5. Step 5: Solve for x
    x = 205,468,868.22/20,667.72
  6. Step 6: Final answer
    x = 9,941.54

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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.