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Finding the Fourth Proportional to 15,016.33, 20,724.59 and 8,642.79

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Solution

The fourth proportional to 15,016.33, 20,724.59 and 8,642.79 is: 11,928.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,016.33 : 20,724.59 = 8,642.79 : x
  2. Step 2: Convert to fraction form
    15,016.33/20,724.59 = 8,642.79/x
  3. Step 3: Cross multiply
    15,016.33x = 20,724.59 × 8,642.79
  4. Step 4: Simplify right side
    15,016.33x = 179,118,190.69
  5. Step 5: Solve for x
    x = 179,118,190.69/15,016.33
  6. Step 6: Final answer
    x = 11,928.23

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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.