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Finding the Fourth Proportional to 18,135.30, 27,170.55 and 15,543.30

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Solution

The fourth proportional to 18,135.30, 27,170.55 and 15,543.30 is: 23,287.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,135.30 : 27,170.55 = 15,543.30 : x
  2. Step 2: Convert to fraction form
    18,135.30/27,170.55 = 15,543.30/x
  3. Step 3: Cross multiply
    18,135.30x = 27,170.55 × 15,543.30
  4. Step 4: Simplify right side
    18,135.30x = 422,320,009.82
  5. Step 5: Solve for x
    x = 422,320,009.82/18,135.30
  6. Step 6: Final answer
    x = 23,287.18

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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.