Home / 18,719.30-28,078.86-7,623.36

Finding the Fourth Proportional to 18,719.30, 28,078.86 and 7,623.36

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Solution

The fourth proportional to 18,719.30, 28,078.86 and 7,623.36 is: 11,435.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.30 : 28,078.86 = 7,623.36 : x
  2. Step 2: Convert to fraction form
    18,719.30/28,078.86 = 7,623.36/x
  3. Step 3: Cross multiply
    18,719.30x = 28,078.86 × 7,623.36
  4. Step 4: Simplify right side
    18,719.30x = 214,055,258.17
  5. Step 5: Solve for x
    x = 214,055,258.17/18,719.30
  6. Step 6: Final answer
    x = 11,435.00

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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.