Home / 13,028.31-17,979.41-7,989.62

Finding the Fourth Proportional to 13,028.31, 17,979.41 and 7,989.62

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Solution

The fourth proportional to 13,028.31, 17,979.41 and 7,989.62 is: 11,025.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,028.31 : 17,979.41 = 7,989.62 : x
  2. Step 2: Convert to fraction form
    13,028.31/17,979.41 = 7,989.62/x
  3. Step 3: Cross multiply
    13,028.31x = 17,979.41 × 7,989.62
  4. Step 4: Simplify right side
    13,028.31x = 143,648,583.80
  5. Step 5: Solve for x
    x = 143,648,583.80/13,028.31
  6. Step 6: Final answer
    x = 11,025.88

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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.