Home / 13,021.80-19,518.30-7,182.60

Finding the Fourth Proportional to 13,021.80, 19,518.30 and 7,182.60

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Solution

The fourth proportional to 13,021.80, 19,518.30 and 7,182.60 is: 10,765.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,021.80 : 19,518.30 = 7,182.60 : x
  2. Step 2: Convert to fraction form
    13,021.80/19,518.30 = 7,182.60/x
  3. Step 3: Cross multiply
    13,021.80x = 19,518.30 × 7,182.60
  4. Step 4: Simplify right side
    13,021.80x = 140,192,141.58
  5. Step 5: Solve for x
    x = 140,192,141.58/13,021.80
  6. Step 6: Final answer
    x = 10,765.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.