Home / 15,439.25-21,305.88-8,724.73

Finding the Fourth Proportional to 15,439.25, 21,305.88 and 8,724.73

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Solution

The fourth proportional to 15,439.25, 21,305.88 and 8,724.73 is: 12,039.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,439.25 : 21,305.88 = 8,724.73 : x
  2. Step 2: Convert to fraction form
    15,439.25/21,305.88 = 8,724.73/x
  3. Step 3: Cross multiply
    15,439.25x = 21,305.88 × 8,724.73
  4. Step 4: Simplify right side
    15,439.25x = 185,888,050.41
  5. Step 5: Solve for x
    x = 185,888,050.41/15,439.25
  6. Step 6: Final answer
    x = 12,039.97

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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.