Home / 13,742.75-18,964.23-7,775.61

Finding the Fourth Proportional to 13,742.75, 18,964.23 and 7,775.61

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Solution

The fourth proportional to 13,742.75, 18,964.23 and 7,775.61 is: 10,729.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,742.75 : 18,964.23 = 7,775.61 : x
  2. Step 2: Convert to fraction form
    13,742.75/18,964.23 = 7,775.61/x
  3. Step 3: Cross multiply
    13,742.75x = 18,964.23 × 7,775.61
  4. Step 4: Simplify right side
    13,742.75x = 147,458,456.43
  5. Step 5: Solve for x
    x = 147,458,456.43/13,742.75
  6. Step 6: Final answer
    x = 10,729.91

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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.