Home / 13,186.21-18,198.20-7,880.92

Finding the Fourth Proportional to 13,186.21, 18,198.20 and 7,880.92

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Solution

The fourth proportional to 13,186.21, 18,198.20 and 7,880.92 is: 10,876.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,186.21 : 18,198.20 = 7,880.92 : x
  2. Step 2: Convert to fraction form
    13,186.21/18,198.20 = 7,880.92/x
  3. Step 3: Cross multiply
    13,186.21x = 18,198.20 × 7,880.92
  4. Step 4: Simplify right side
    13,186.21x = 143,418,558.34
  5. Step 5: Solve for x
    x = 143,418,558.34/13,186.21
  6. Step 6: Final answer
    x = 10,876.40

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Half scale
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Double scale
Find fourth proportional to 13,187.21, 18,199.58 and 7,881.92
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.