Home / 13,106.20-18,086.86-7,138.18

Finding the Fourth Proportional to 13,106.20, 18,086.86 and 7,138.18

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Solution

The fourth proportional to 13,106.20, 18,086.86 and 7,138.18 is: 9,850.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,106.20 : 18,086.86 = 7,138.18 : x
  2. Step 2: Convert to fraction form
    13,106.20/18,086.86 = 7,138.18/x
  3. Step 3: Cross multiply
    13,106.20x = 18,086.86 × 7,138.18
  4. Step 4: Simplify right side
    13,106.20x = 129,107,262.31
  5. Step 5: Solve for x
    x = 129,107,262.31/13,106.20
  6. Step 6: Final answer
    x = 9,850.85

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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.