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Finding the Fourth Proportional to 7,392, 11,088.72 and 3,288

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Solution

The fourth proportional to 7,392, 11,088.72 and 3,288 is: 4,932.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,392 : 11,088.72 = 3,288 : x
  2. Step 2: Convert to fraction form
    7,392/11,088.72 = 3,288/x
  3. Step 3: Cross multiply
    7,392x = 11,088.72 × 3,288
  4. Step 4: Simplify right side
    7,392x = 36,459,711.36
  5. Step 5: Solve for x
    x = 36,459,711.36/7,392
  6. Step 6: Final answer
    x = 4,932.32

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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.