Home / 13,221.12-18,245.16-7,252.80

Finding the Fourth Proportional to 13,221.12, 18,245.16 and 7,252.80

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Solution

The fourth proportional to 13,221.12, 18,245.16 and 7,252.80 is: 10,008.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.12 : 18,245.16 = 7,252.80 : x
  2. Step 2: Convert to fraction form
    13,221.12/18,245.16 = 7,252.80/x
  3. Step 3: Cross multiply
    13,221.12x = 18,245.16 × 7,252.80
  4. Step 4: Simplify right side
    13,221.12x = 132,328,496.45
  5. Step 5: Solve for x
    x = 132,328,496.45/13,221.12
  6. Step 6: Final answer
    x = 10,008.87

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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.