Home / 21,149.47-31,724.43-8,505.09

Finding the Fourth Proportional to 21,149.47, 31,724.43 and 8,505.09

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Solution

The fourth proportional to 21,149.47, 31,724.43 and 8,505.09 is: 12,757.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.47 : 31,724.43 = 8,505.09 : x
  2. Step 2: Convert to fraction form
    21,149.47/31,724.43 = 8,505.09/x
  3. Step 3: Cross multiply
    21,149.47x = 31,724.43 × 8,505.09
  4. Step 4: Simplify right side
    21,149.47x = 269,819,132.35
  5. Step 5: Solve for x
    x = 269,819,132.35/21,149.47
  6. Step 6: Final answer
    x = 12,757.73

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1.5x scale

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.