Home / 13,119.12-18,104.40-7,150.68

Finding the Fourth Proportional to 13,119.12, 18,104.40 and 7,150.68

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Solution

The fourth proportional to 13,119.12, 18,104.40 and 7,150.68 is: 9,867.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119.12 : 18,104.40 = 7,150.68 : x
  2. Step 2: Convert to fraction form
    13,119.12/18,104.40 = 7,150.68/x
  3. Step 3: Cross multiply
    13,119.12x = 18,104.40 × 7,150.68
  4. Step 4: Simplify right side
    13,119.12x = 129,458,770.99
  5. Step 5: Solve for x
    x = 129,458,770.99/13,119.12
  6. Step 6: Final answer
    x = 9,867.95

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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.