Home / 12,880.89-19,321.34-12,193.20

Finding the Fourth Proportional to 12,880.89, 19,321.34 and 12,193.20

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Solution

The fourth proportional to 12,880.89, 19,321.34 and 12,193.20 is: 18,289.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,880.89 : 19,321.34 = 12,193.20 : x
  2. Step 2: Convert to fraction form
    12,880.89/19,321.34 = 12,193.20/x
  3. Step 3: Cross multiply
    12,880.89x = 19,321.34 × 12,193.20
  4. Step 4: Simplify right side
    12,880.89x = 235,588,901.92
  5. Step 5: Solve for x
    x = 235,588,901.92/12,880.89
  6. Step 6: Final answer
    x = 18,289.80

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.