Home / 15,939.48-21,997.26-8,865.78

Finding the Fourth Proportional to 15,939.48, 21,997.26 and 8,865.78

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Solution

The fourth proportional to 15,939.48, 21,997.26 and 8,865.78 is: 12,235.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,939.48 : 21,997.26 = 8,865.78 : x
  2. Step 2: Convert to fraction form
    15,939.48/21,997.26 = 8,865.78/x
  3. Step 3: Cross multiply
    15,939.48x = 21,997.26 × 8,865.78
  4. Step 4: Simplify right side
    15,939.48x = 195,022,867.76
  5. Step 5: Solve for x
    x = 195,022,867.76/15,939.48
  6. Step 6: Final answer
    x = 12,235.21

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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.