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Finding the Fourth Proportional to 12,611.09, 18,879.91 and 9,829.28

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Solution

The fourth proportional to 12,611.09, 18,879.91 and 9,829.28 is: 14,715.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,611.09 : 18,879.91 = 9,829.28 : x
  2. Step 2: Convert to fraction form
    12,611.09/18,879.91 = 9,829.28/x
  3. Step 3: Cross multiply
    12,611.09x = 18,879.91 × 9,829.28
  4. Step 4: Simplify right side
    12,611.09x = 185,575,944.39
  5. Step 5: Solve for x
    x = 185,575,944.39/12,611.09
  6. Step 6: Final answer
    x = 14,715.29

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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.