Home / 8,719.17-13,078.79-2,145.34

Finding the Fourth Proportional to 8,719.17, 13,078.79 and 2,145.34

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Solution

The fourth proportional to 8,719.17, 13,078.79 and 2,145.34 is: 3,218.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,719.17 : 13,078.79 = 2,145.34 : x
  2. Step 2: Convert to fraction form
    8,719.17/13,078.79 = 2,145.34/x
  3. Step 3: Cross multiply
    8,719.17x = 13,078.79 × 2,145.34
  4. Step 4: Simplify right side
    8,719.17x = 28,058,385.94
  5. Step 5: Solve for x
    x = 28,058,385.94/8,719.17
  6. Step 6: Final answer
    x = 3,218.01

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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.