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Finding the Fourth Proportional to 18,005.76, 26,998.64 and 7,472.88

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Solution

The fourth proportional to 18,005.76, 26,998.64 and 7,472.88 is: 11,205.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,005.76 : 26,998.64 = 7,472.88 : x
  2. Step 2: Convert to fraction form
    18,005.76/26,998.64 = 7,472.88/x
  3. Step 3: Cross multiply
    18,005.76x = 26,998.64 × 7,472.88
  4. Step 4: Simplify right side
    18,005.76x = 201,757,596.88
  5. Step 5: Solve for x
    x = 201,757,596.88/18,005.76
  6. Step 6: Final answer
    x = 11,205.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.