Home / 21,431.32-29,573.58-11,998.60

Finding the Fourth Proportional to 21,431.32, 29,573.58 and 11,998.60

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Solution

The fourth proportional to 21,431.32, 29,573.58 and 11,998.60 is: 16,557.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.32 : 29,573.58 = 11,998.60 : x
  2. Step 2: Convert to fraction form
    21,431.32/29,573.58 = 11,998.60/x
  3. Step 3: Cross multiply
    21,431.32x = 29,573.58 × 11,998.60
  4. Step 4: Simplify right side
    21,431.32x = 354,841,556.99
  5. Step 5: Solve for x
    x = 354,841,556.99/21,431.32
  6. Step 6: Final answer
    x = 16,557.15

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.