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Finding the Fourth Proportional to 30,611.83, 45,909.06 and 11,887.87

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Solution

The fourth proportional to 30,611.83, 45,909.06 and 11,887.87 is: 17,828.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,611.83 : 45,909.06 = 11,887.87 : x
  2. Step 2: Convert to fraction form
    30,611.83/45,909.06 = 11,887.87/x
  3. Step 3: Cross multiply
    30,611.83x = 45,909.06 × 11,887.87
  4. Step 4: Simplify right side
    30,611.83x = 545,760,992.44
  5. Step 5: Solve for x
    x = 545,760,992.44/30,611.83
  6. Step 6: Final answer
    x = 17,828.43

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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.