Home / 13,122.56-18,110.88-8,416.76

Finding the Fourth Proportional to 13,122.56, 18,110.88 and 8,416.76

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Solution

The fourth proportional to 13,122.56, 18,110.88 and 8,416.76 is: 11,616.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,122.56 : 18,110.88 = 8,416.76 : x
  2. Step 2: Convert to fraction form
    13,122.56/18,110.88 = 8,416.76/x
  3. Step 3: Cross multiply
    13,122.56x = 18,110.88 × 8,416.76
  4. Step 4: Simplify right side
    13,122.56x = 152,434,930.35
  5. Step 5: Solve for x
    x = 152,434,930.35/13,122.56
  6. Step 6: Final answer
    x = 11,616.25

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Half scale
Find fourth proportional to 26,245.12, 36,221.76 and 16,833.52
Double scale
Find fourth proportional to 13,123.56, 18,112.26 and 8,417.76
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.