Home / 21,007.23-28,991.38-11,575.79

Finding the Fourth Proportional to 21,007.23, 28,991.38 and 11,575.79

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Solution

The fourth proportional to 21,007.23, 28,991.38 and 11,575.79 is: 15,975.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.23 : 28,991.38 = 11,575.79 : x
  2. Step 2: Convert to fraction form
    21,007.23/28,991.38 = 11,575.79/x
  3. Step 3: Cross multiply
    21,007.23x = 28,991.38 × 11,575.79
  4. Step 4: Simplify right side
    21,007.23x = 335,598,126.69
  5. Step 5: Solve for x
    x = 335,598,126.69/21,007.23
  6. Step 6: Final answer
    x = 15,975.37

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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.