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Finding the Fourth Proportional to 15,191.42, 20,964.13 and 8,476.65

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Solution

The fourth proportional to 15,191.42, 20,964.13 and 8,476.65 is: 11,697.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,191.42 : 20,964.13 = 8,476.65 : x
  2. Step 2: Convert to fraction form
    15,191.42/20,964.13 = 8,476.65/x
  3. Step 3: Cross multiply
    15,191.42x = 20,964.13 × 8,476.65
  4. Step 4: Simplify right side
    15,191.42x = 177,705,571.37
  5. Step 5: Solve for x
    x = 177,705,571.37/15,191.42
  6. Step 6: Final answer
    x = 11,697.76

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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.