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Finding the Fourth Proportional to 11,489.76, 15,822.72 and 10,964.88

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Solution

The fourth proportional to 11,489.76, 15,822.72 and 10,964.88 is: 15,099.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,489.76 : 15,822.72 = 10,964.88 : x
  2. Step 2: Convert to fraction form
    11,489.76/15,822.72 = 10,964.88/x
  3. Step 3: Cross multiply
    11,489.76x = 15,822.72 × 10,964.88
  4. Step 4: Simplify right side
    11,489.76x = 173,494,226.07
  5. Step 5: Solve for x
    x = 173,494,226.07/11,489.76
  6. Step 6: Final answer
    x = 15,099.90

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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.