Home / 13,758.12-18,982.35-7,789.66

Finding the Fourth Proportional to 13,758.12, 18,982.35 and 7,789.66

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Solution

The fourth proportional to 13,758.12, 18,982.35 and 7,789.66 is: 10,747.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,758.12 : 18,982.35 = 7,789.66 : x
  2. Step 2: Convert to fraction form
    13,758.12/18,982.35 = 7,789.66/x
  3. Step 3: Cross multiply
    13,758.12x = 18,982.35 × 7,789.66
  4. Step 4: Simplify right side
    13,758.12x = 147,866,005.05
  5. Step 5: Solve for x
    x = 147,866,005.05/13,758.12
  6. Step 6: Final answer
    x = 10,747.54

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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.