Home / 11,320.28-16,979.88-5,459.12

Finding the Fourth Proportional to 11,320.28, 16,979.88 and 5,459.12

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Solution

The fourth proportional to 11,320.28, 16,979.88 and 5,459.12 is: 8,188.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,320.28 : 16,979.88 = 5,459.12 : x
  2. Step 2: Convert to fraction form
    11,320.28/16,979.88 = 5,459.12/x
  3. Step 3: Cross multiply
    11,320.28x = 16,979.88 × 5,459.12
  4. Step 4: Simplify right side
    11,320.28x = 92,695,202.51
  5. Step 5: Solve for x
    x = 92,695,202.51/11,320.28
  6. Step 6: Final answer
    x = 8,188.42

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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.