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Finding the Fourth Proportional to 18,115.34, 27,167.74 and 7,019.55

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Solution

The fourth proportional to 18,115.34, 27,167.74 and 7,019.55 is: 10,527.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.34 : 27,167.74 = 7,019.55 : x
  2. Step 2: Convert to fraction form
    18,115.34/27,167.74 = 7,019.55/x
  3. Step 3: Cross multiply
    18,115.34x = 27,167.74 × 7,019.55
  4. Step 4: Simplify right side
    18,115.34x = 190,705,291.77
  5. Step 5: Solve for x
    x = 190,705,291.77/18,115.34
  6. Step 6: Final answer
    x = 10,527.28

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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.