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Finding the Fourth Proportional to 14,928.87, 20,601.33 and 8,213.87

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Solution

The fourth proportional to 14,928.87, 20,601.33 and 8,213.87 is: 11,334.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,928.87 : 20,601.33 = 8,213.87 : x
  2. Step 2: Convert to fraction form
    14,928.87/20,601.33 = 8,213.87/x
  3. Step 3: Cross multiply
    14,928.87x = 20,601.33 × 8,213.87
  4. Step 4: Simplify right side
    14,928.87x = 169,216,589.89
  5. Step 5: Solve for x
    x = 169,216,589.89/14,928.87
  6. Step 6: Final answer
    x = 11,334.86

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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.