Home / 11,108.53-15,331.44-6,391.90

Finding the Fourth Proportional to 11,108.53, 15,331.44 and 6,391.90

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Solution

The fourth proportional to 11,108.53, 15,331.44 and 6,391.90 is: 8,821.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,108.53 : 15,331.44 = 6,391.90 : x
  2. Step 2: Convert to fraction form
    11,108.53/15,331.44 = 6,391.90/x
  3. Step 3: Cross multiply
    11,108.53x = 15,331.44 × 6,391.90
  4. Step 4: Simplify right side
    11,108.53x = 97,997,031.34
  5. Step 5: Solve for x
    x = 97,997,031.34/11,108.53
  6. Step 6: Final answer
    x = 8,821.78

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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.