Home / 11,103.80-15,324.92-6,387.78

Finding the Fourth Proportional to 11,103.80, 15,324.92 and 6,387.78

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Solution

The fourth proportional to 11,103.80, 15,324.92 and 6,387.78 is: 8,816.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,103.80 : 15,324.92 = 6,387.78 : x
  2. Step 2: Convert to fraction form
    11,103.80/15,324.92 = 6,387.78/x
  3. Step 3: Cross multiply
    11,103.80x = 15,324.92 × 6,387.78
  4. Step 4: Simplify right side
    11,103.80x = 97,892,217.48
  5. Step 5: Solve for x
    x = 97,892,217.48/11,103.80
  6. Step 6: Final answer
    x = 8,816.10

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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.