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Finding the Fourth Proportional to 11,879.68, 17,731.77 and 10,478.88

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Solution

The fourth proportional to 11,879.68, 17,731.77 and 10,478.88 is: 15,640.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,879.68 : 17,731.77 = 10,478.88 : x
  2. Step 2: Convert to fraction form
    11,879.68/17,731.77 = 10,478.88/x
  3. Step 3: Cross multiply
    11,879.68x = 17,731.77 × 10,478.88
  4. Step 4: Simplify right side
    11,879.68x = 185,809,090.02
  5. Step 5: Solve for x
    x = 185,809,090.02/11,879.68
  6. Step 6: Final answer
    x = 15,640.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.