Home / 12,131.98-18,190.10-5,108.35

Finding the Fourth Proportional to 12,131.98, 18,190.10 and 5,108.35

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Solution

The fourth proportional to 12,131.98, 18,190.10 and 5,108.35 is: 7,659.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,131.98 : 18,190.10 = 5,108.35 : x
  2. Step 2: Convert to fraction form
    12,131.98/18,190.10 = 5,108.35/x
  3. Step 3: Cross multiply
    12,131.98x = 18,190.10 × 5,108.35
  4. Step 4: Simplify right side
    12,131.98x = 92,921,398.74
  5. Step 5: Solve for x
    x = 92,921,398.74/12,131.98
  6. Step 6: Final answer
    x = 7,659.21

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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.