Home / 21,008.19-28,991.61-11,576.75

Finding the Fourth Proportional to 21,008.19, 28,991.61 and 11,576.75

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Solution

The fourth proportional to 21,008.19, 28,991.61 and 11,576.75 is: 15,976.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.19 : 28,991.61 = 11,576.75 : x
  2. Step 2: Convert to fraction form
    21,008.19/28,991.61 = 11,576.75/x
  3. Step 3: Cross multiply
    21,008.19x = 28,991.61 × 11,576.75
  4. Step 4: Simplify right side
    21,008.19x = 335,628,563.18
  5. Step 5: Solve for x
    x = 335,628,563.18/21,008.19
  6. Step 6: Final answer
    x = 15,976.08

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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.