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Finding the Fourth Proportional to 8,685.44, 11,986.20 and 4,908.56

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Solution

The fourth proportional to 8,685.44, 11,986.20 and 4,908.56 is: 6,773.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.44 : 11,986.20 = 4,908.56 : x
  2. Step 2: Convert to fraction form
    8,685.44/11,986.20 = 4,908.56/x
  3. Step 3: Cross multiply
    8,685.44x = 11,986.20 × 4,908.56
  4. Step 4: Simplify right side
    8,685.44x = 58,834,981.87
  5. Step 5: Solve for x
    x = 58,834,981.87/8,685.44
  6. Step 6: Final answer
    x = 6,773.98

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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.