Home / 11,320.80-16,989.30-6,385.20

Finding the Fourth Proportional to 11,320.80, 16,989.30 and 6,385.20

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Solution

The fourth proportional to 11,320.80, 16,989.30 and 6,385.20 is: 9,582.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,320.80 : 16,989.30 = 6,385.20 : x
  2. Step 2: Convert to fraction form
    11,320.80/16,989.30 = 6,385.20/x
  3. Step 3: Cross multiply
    11,320.80x = 16,989.30 × 6,385.20
  4. Step 4: Simplify right side
    11,320.80x = 108,480,078.36
  5. Step 5: Solve for x
    x = 108,480,078.36/11,320.80
  6. Step 6: Final answer
    x = 9,582.37

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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.