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Finding the Fourth Proportional to 18,115.05, 27,117.90 and 18,115.05

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Solution

The fourth proportional to 18,115.05, 27,117.90 and 18,115.05 is: 27,117.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.05 : 27,117.90 = 18,115.05 : x
  2. Step 2: Convert to fraction form
    18,115.05/27,117.90 = 18,115.05/x
  3. Step 3: Cross multiply
    18,115.05x = 27,117.90 × 18,115.05
  4. Step 4: Simplify right side
    18,115.05x = 491,242,114.40
  5. Step 5: Solve for x
    x = 491,242,114.40/18,115.05
  6. Step 6: Final answer
    x = 27,117.90

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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.