Home / 13,218.88-18,245.22-8,445.92

Finding the Fourth Proportional to 13,218.88, 18,245.22 and 8,445.92

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Solution

The fourth proportional to 13,218.88, 18,245.22 and 8,445.92 is: 11,657.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.88 : 18,245.22 = 8,445.92 : x
  2. Step 2: Convert to fraction form
    13,218.88/18,245.22 = 8,445.92/x
  3. Step 3: Cross multiply
    13,218.88x = 18,245.22 × 8,445.92
  4. Step 4: Simplify right side
    13,218.88x = 154,097,666.05
  5. Step 5: Solve for x
    x = 154,097,666.05/13,218.88
  6. Step 6: Final answer
    x = 11,657.39

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Half scale
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Double scale
Find fourth proportional to 13,219.88, 18,246.60 and 8,446.92
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.