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Finding the Fourth Proportional to 18,486.12, 27,717.78 and 7,962.84

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Solution

The fourth proportional to 18,486.12, 27,717.78 and 7,962.84 is: 11,939.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,486.12 : 27,717.78 = 7,962.84 : x
  2. Step 2: Convert to fraction form
    18,486.12/27,717.78 = 7,962.84/x
  3. Step 3: Cross multiply
    18,486.12x = 27,717.78 × 7,962.84
  4. Step 4: Simplify right side
    18,486.12x = 220,712,247.30
  5. Step 5: Solve for x
    x = 220,712,247.30/18,486.12
  6. Step 6: Final answer
    x = 11,939.35

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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.