Home / 12,991.77-19,481.76-6,415.38

Finding the Fourth Proportional to 12,991.77, 19,481.76 and 6,415.38

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Solution

The fourth proportional to 12,991.77, 19,481.76 and 6,415.38 is: 9,620.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,991.77 : 19,481.76 = 6,415.38 : x
  2. Step 2: Convert to fraction form
    12,991.77/19,481.76 = 6,415.38/x
  3. Step 3: Cross multiply
    12,991.77x = 19,481.76 × 6,415.38
  4. Step 4: Simplify right side
    12,991.77x = 124,982,893.47
  5. Step 5: Solve for x
    x = 124,982,893.47/12,991.77
  6. Step 6: Final answer
    x = 9,620.16

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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.