Home / 21,086.82-29,099.94-11,655.40

Finding the Fourth Proportional to 21,086.82, 29,099.94 and 11,655.40

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Solution

The fourth proportional to 21,086.82, 29,099.94 and 11,655.40 is: 16,084.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,086.82 : 29,099.94 = 11,655.40 : x
  2. Step 2: Convert to fraction form
    21,086.82/29,099.94 = 11,655.40/x
  3. Step 3: Cross multiply
    21,086.82x = 29,099.94 × 11,655.40
  4. Step 4: Simplify right side
    21,086.82x = 339,171,440.68
  5. Step 5: Solve for x
    x = 339,171,440.68/21,086.82
  6. Step 6: Final answer
    x = 16,084.52

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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.