Home / 12,087.36-18,114.64-8,979.09

Finding the Fourth Proportional to 12,087.36, 18,114.64 and 8,979.09

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Solution

The fourth proportional to 12,087.36, 18,114.64 and 8,979.09 is: 13,456.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,087.36 : 18,114.64 = 8,979.09 : x
  2. Step 2: Convert to fraction form
    12,087.36/18,114.64 = 8,979.09/x
  3. Step 3: Cross multiply
    12,087.36x = 18,114.64 × 8,979.09
  4. Step 4: Simplify right side
    12,087.36x = 162,652,892.50
  5. Step 5: Solve for x
    x = 162,652,892.50/12,087.36
  6. Step 6: Final answer
    x = 13,456.44

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1.5x scale

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.