Home / 20,288-27,997.80-11,904.32

Finding the Fourth Proportional to 20,288, 27,997.80 and 11,904.32

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Solution

The fourth proportional to 20,288, 27,997.80 and 11,904.32 is: 16,428.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288 : 27,997.80 = 11,904.32 : x
  2. Step 2: Convert to fraction form
    20,288/27,997.80 = 11,904.32/x
  3. Step 3: Cross multiply
    20,288x = 27,997.80 × 11,904.32
  4. Step 4: Simplify right side
    20,288x = 333,294,770.50
  5. Step 5: Solve for x
    x = 333,294,770.50/20,288
  6. Step 6: Final answer
    x = 16,428.17

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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.