Home / 18,520.13-25,557.84-12,940.85

Finding the Fourth Proportional to 18,520.13, 25,557.84 and 12,940.85

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Solution

The fourth proportional to 18,520.13, 25,557.84 and 12,940.85 is: 17,858.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,520.13 : 25,557.84 = 12,940.85 : x
  2. Step 2: Convert to fraction form
    18,520.13/25,557.84 = 12,940.85/x
  3. Step 3: Cross multiply
    18,520.13x = 25,557.84 × 12,940.85
  4. Step 4: Simplify right side
    18,520.13x = 330,740,045.97
  5. Step 5: Solve for x
    x = 330,740,045.97/18,520.13
  6. Step 6: Final answer
    x = 17,858.41

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.