Home / 13,180.76-18,189.74-7,212.43

Finding the Fourth Proportional to 13,180.76, 18,189.74 and 7,212.43

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Solution

The fourth proportional to 13,180.76, 18,189.74 and 7,212.43 is: 9,953.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,180.76 : 18,189.74 = 7,212.43 : x
  2. Step 2: Convert to fraction form
    13,180.76/18,189.74 = 7,212.43/x
  3. Step 3: Cross multiply
    13,180.76x = 18,189.74 × 7,212.43
  4. Step 4: Simplify right side
    13,180.76x = 131,192,135.52
  5. Step 5: Solve for x
    x = 131,192,135.52/13,180.76
  6. Step 6: Final answer
    x = 9,953.31

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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.