Home / 12,947.86-19,421.79-3,940.66

Finding the Fourth Proportional to 12,947.86, 19,421.79 and 3,940.66

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Solution

The fourth proportional to 12,947.86, 19,421.79 and 3,940.66 is: 5,910.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,947.86 : 19,421.79 = 3,940.66 : x
  2. Step 2: Convert to fraction form
    12,947.86/19,421.79 = 3,940.66/x
  3. Step 3: Cross multiply
    12,947.86x = 19,421.79 × 3,940.66
  4. Step 4: Simplify right side
    12,947.86x = 76,534,670.98
  5. Step 5: Solve for x
    x = 76,534,670.98/12,947.86
  6. Step 6: Final answer
    x = 5,910.99

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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.