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Finding the Fourth Proportional to 15,185.52, 20,956.08 and 8,471.55

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Solution

The fourth proportional to 15,185.52, 20,956.08 and 8,471.55 is: 11,690.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,185.52 : 20,956.08 = 8,471.55 : x
  2. Step 2: Convert to fraction form
    15,185.52/20,956.08 = 8,471.55/x
  3. Step 3: Cross multiply
    15,185.52x = 20,956.08 × 8,471.55
  4. Step 4: Simplify right side
    15,185.52x = 177,530,479.52
  5. Step 5: Solve for x
    x = 177,530,479.52/15,185.52
  6. Step 6: Final answer
    x = 11,690.77

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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.