Home / 13,206.76-18,221.70-8,168.56

Finding the Fourth Proportional to 13,206.76, 18,221.70 and 8,168.56

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Solution

The fourth proportional to 13,206.76, 18,221.70 and 8,168.56 is: 11,270.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,206.76 : 18,221.70 = 8,168.56 : x
  2. Step 2: Convert to fraction form
    13,206.76/18,221.70 = 8,168.56/x
  3. Step 3: Cross multiply
    13,206.76x = 18,221.70 × 8,168.56
  4. Step 4: Simplify right side
    13,206.76x = 148,845,049.75
  5. Step 5: Solve for x
    x = 148,845,049.75/13,206.76
  6. Step 6: Final answer
    x = 11,270.37

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Find fourth proportional to 6,603.38, 9,110.85 and 4,084.28
Half scale
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Double scale
Find fourth proportional to 13,207.76, 18,223.08 and 8,169.56
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.