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Finding the Fourth Proportional to 18,014.20, 27,005.10 and 11,777.20

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Solution

The fourth proportional to 18,014.20, 27,005.10 and 11,777.20 is: 17,655.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,014.20 : 27,005.10 = 11,777.20 : x
  2. Step 2: Convert to fraction form
    18,014.20/27,005.10 = 11,777.20/x
  3. Step 3: Cross multiply
    18,014.20x = 27,005.10 × 11,777.20
  4. Step 4: Simplify right side
    18,014.20x = 318,044,463.72
  5. Step 5: Solve for x
    x = 318,044,463.72/18,014.20
  6. Step 6: Final answer
    x = 17,655.21

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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.