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Finding the Fourth Proportional to 15,191.19, 20,964.24 and 8,476.56

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Solution

The fourth proportional to 15,191.19, 20,964.24 and 8,476.56 is: 11,697.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,191.19 : 20,964.24 = 8,476.56 : x
  2. Step 2: Convert to fraction form
    15,191.19/20,964.24 = 8,476.56/x
  3. Step 3: Cross multiply
    15,191.19x = 20,964.24 × 8,476.56
  4. Step 4: Simplify right side
    15,191.19x = 177,704,638.21
  5. Step 5: Solve for x
    x = 177,704,638.21/15,191.19
  6. Step 6: Final answer
    x = 11,697.87

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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.