Home / 13,215.20-18,236.07-7,245.63

Finding the Fourth Proportional to 13,215.20, 18,236.07 and 7,245.63

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Solution

The fourth proportional to 13,215.20, 18,236.07 and 7,245.63 is: 9,998.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.20 : 18,236.07 = 7,245.63 : x
  2. Step 2: Convert to fraction form
    13,215.20/18,236.07 = 7,245.63/x
  3. Step 3: Cross multiply
    13,215.20x = 18,236.07 × 7,245.63
  4. Step 4: Simplify right side
    13,215.20x = 132,131,815.87
  5. Step 5: Solve for x
    x = 132,131,815.87/13,215.20
  6. Step 6: Final answer
    x = 9,998.47

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Double scale
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Similar ratio
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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.