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Finding the Fourth Proportional to 8,921.60, 12,274.06 and 8,675.56

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Solution

The fourth proportional to 8,921.60, 12,274.06 and 8,675.56 is: 11,935.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.60 : 12,274.06 = 8,675.56 : x
  2. Step 2: Convert to fraction form
    8,921.60/12,274.06 = 8,675.56/x
  3. Step 3: Cross multiply
    8,921.60x = 12,274.06 × 8,675.56
  4. Step 4: Simplify right side
    8,921.60x = 106,484,343.97
  5. Step 5: Solve for x
    x = 106,484,343.97/8,921.60
  6. Step 6: Final answer
    x = 11,935.57

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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.