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Finding the Fourth Proportional to 18,115.76, 27,178.72 and 10,330.08

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Solution

The fourth proportional to 18,115.76, 27,178.72 and 10,330.08 is: 15,498.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.76 : 27,178.72 = 10,330.08 : x
  2. Step 2: Convert to fraction form
    18,115.76/27,178.72 = 10,330.08/x
  3. Step 3: Cross multiply
    18,115.76x = 27,178.72 × 10,330.08
  4. Step 4: Simplify right side
    18,115.76x = 280,758,351.90
  5. Step 5: Solve for x
    x = 280,758,351.90/18,115.76
  6. Step 6: Final answer
    x = 15,498.02

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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.