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Finding the Fourth Proportional to 18,090.40, 27,135.60 and 11,545.60

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Solution

The fourth proportional to 18,090.40, 27,135.60 and 11,545.60 is: 17,318.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,090.40 : 27,135.60 = 11,545.60 : x
  2. Step 2: Convert to fraction form
    18,090.40/27,135.60 = 11,545.60/x
  3. Step 3: Cross multiply
    18,090.40x = 27,135.60 × 11,545.60
  4. Step 4: Simplify right side
    18,090.40x = 313,296,783.36
  5. Step 5: Solve for x
    x = 313,296,783.36/18,090.40
  6. Step 6: Final answer
    x = 17,318.40

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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.