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Finding the Fourth Proportional to 11,998.61, 18,004.74 and 5,758.06

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Solution

The fourth proportional to 11,998.61, 18,004.74 and 5,758.06 is: 8,640.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,998.61 : 18,004.74 = 5,758.06 : x
  2. Step 2: Convert to fraction form
    11,998.61/18,004.74 = 5,758.06/x
  3. Step 3: Cross multiply
    11,998.61x = 18,004.74 × 5,758.06
  4. Step 4: Simplify right side
    11,998.61x = 103,672,373.20
  5. Step 5: Solve for x
    x = 103,672,373.20/11,998.61
  6. Step 6: Final answer
    x = 8,640.37

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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.