Home / 15,939.90-21,997.61-9,135.09

Finding the Fourth Proportional to 15,939.90, 21,997.61 and 9,135.09

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Solution

The fourth proportional to 15,939.90, 21,997.61 and 9,135.09 is: 12,606.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,939.90 : 21,997.61 = 9,135.09 : x
  2. Step 2: Convert to fraction form
    15,939.90/21,997.61 = 9,135.09/x
  3. Step 3: Cross multiply
    15,939.90x = 21,997.61 × 9,135.09
  4. Step 4: Simplify right side
    15,939.90x = 200,950,135.72
  5. Step 5: Solve for x
    x = 200,950,135.72/15,939.90
  6. Step 6: Final answer
    x = 12,606.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.