Home / 11,144.98-15,380.85-6,430.78

Finding the Fourth Proportional to 11,144.98, 15,380.85 and 6,430.78

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Solution

The fourth proportional to 11,144.98, 15,380.85 and 6,430.78 is: 8,874.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,144.98 : 15,380.85 = 6,430.78 : x
  2. Step 2: Convert to fraction form
    11,144.98/15,380.85 = 6,430.78/x
  3. Step 3: Cross multiply
    11,144.98x = 15,380.85 × 6,430.78
  4. Step 4: Simplify right side
    11,144.98x = 98,910,862.56
  5. Step 5: Solve for x
    x = 98,910,862.56/11,144.98
  6. Step 6: Final answer
    x = 8,874.93

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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.