Home / 13,213.20-18,233.31-7,243.63

Finding the Fourth Proportional to 13,213.20, 18,233.31 and 7,243.63

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Solution

The fourth proportional to 13,213.20, 18,233.31 and 7,243.63 is: 9,995.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,213.20 : 18,233.31 = 7,243.63 : x
  2. Step 2: Convert to fraction form
    13,213.20/18,233.31 = 7,243.63/x
  3. Step 3: Cross multiply
    13,213.20x = 18,233.31 × 7,243.63
  4. Step 4: Simplify right side
    13,213.20x = 132,075,351.32
  5. Step 5: Solve for x
    x = 132,075,351.32/13,213.20
  6. Step 6: Final answer
    x = 9,995.71

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Half scale
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Double scale
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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.