Home / 20,571.79-28,389.09-11,619.31

Finding the Fourth Proportional to 20,571.79, 28,389.09 and 11,619.31

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Solution

The fourth proportional to 20,571.79, 28,389.09 and 11,619.31 is: 16,034.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,571.79 : 28,389.09 = 11,619.31 : x
  2. Step 2: Convert to fraction form
    20,571.79/28,389.09 = 11,619.31/x
  3. Step 3: Cross multiply
    20,571.79x = 28,389.09 × 11,619.31
  4. Step 4: Simplify right side
    20,571.79x = 329,861,637.33
  5. Step 5: Solve for x
    x = 329,861,637.33/20,571.79
  6. Step 6: Final answer
    x = 16,034.66

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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.