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Finding the Fourth Proportional to 9,988.08, 13,783.92 and 5,512

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Solution

The fourth proportional to 9,988.08, 13,783.92 and 5,512 is: 7,606.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,988.08 : 13,783.92 = 5,512 : x
  2. Step 2: Convert to fraction form
    9,988.08/13,783.92 = 5,512/x
  3. Step 3: Cross multiply
    9,988.08x = 13,783.92 × 5,512
  4. Step 4: Simplify right side
    9,988.08x = 75,976,967.04
  5. Step 5: Solve for x
    x = 75,976,967.04/9,988.08
  6. Step 6: Final answer
    x = 7,606.76

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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.