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Finding the Fourth Proportional to 13,108.70, 18,101.97 and 8,401.18

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Solution

The fourth proportional to 13,108.70, 18,101.97 and 8,401.18 is: 11,601.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,108.70 : 18,101.97 = 8,401.18 : x
  2. Step 2: Convert to fraction form
    13,108.70/18,101.97 = 8,401.18/x
  3. Step 3: Cross multiply
    13,108.70x = 18,101.97 × 8,401.18
  4. Step 4: Simplify right side
    13,108.70x = 152,077,866.32
  5. Step 5: Solve for x
    x = 152,077,866.32/13,108.70
  6. Step 6: Final answer
    x = 11,601.30

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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.