Home / 8,115.80-11,207.58-5,329.40

Finding the Fourth Proportional to 8,115.80, 11,207.58 and 5,329.40

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Solution

The fourth proportional to 8,115.80, 11,207.58 and 5,329.40 is: 7,359.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.80 : 11,207.58 = 5,329.40 : x
  2. Step 2: Convert to fraction form
    8,115.80/11,207.58 = 5,329.40/x
  3. Step 3: Cross multiply
    8,115.80x = 11,207.58 × 5,329.40
  4. Step 4: Simplify right side
    8,115.80x = 59,729,676.85
  5. Step 5: Solve for x
    x = 59,729,676.85/8,115.80
  6. Step 6: Final answer
    x = 7,359.68

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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.