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Finding the Fourth Proportional to 12,188.88, 18,316.13 and 11,828.03

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Solution

The fourth proportional to 12,188.88, 18,316.13 and 11,828.03 is: 17,773.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,188.88 : 18,316.13 = 11,828.03 : x
  2. Step 2: Convert to fraction form
    12,188.88/18,316.13 = 11,828.03/x
  3. Step 3: Cross multiply
    12,188.88x = 18,316.13 × 11,828.03
  4. Step 4: Simplify right side
    12,188.88x = 216,643,584.40
  5. Step 5: Solve for x
    x = 216,643,584.40/12,188.88
  6. Step 6: Final answer
    x = 17,773.87

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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.