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Finding the Fourth Proportional to 11,992.40, 18,010.20 and 11,603.60

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Solution

The fourth proportional to 11,992.40, 18,010.20 and 11,603.60 is: 17,426.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,992.40 : 18,010.20 = 11,603.60 : x
  2. Step 2: Convert to fraction form
    11,992.40/18,010.20 = 11,603.60/x
  3. Step 3: Cross multiply
    11,992.40x = 18,010.20 × 11,603.60
  4. Step 4: Simplify right side
    11,992.40x = 208,983,156.72
  5. Step 5: Solve for x
    x = 208,983,156.72/11,992.40
  6. Step 6: Final answer
    x = 17,426.30

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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.