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Finding the Fourth Proportional to 6,392.64, 9,581.64 and 2,689.32

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Solution

The fourth proportional to 6,392.64, 9,581.64 and 2,689.32 is: 4,030.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,392.64 : 9,581.64 = 2,689.32 : x
  2. Step 2: Convert to fraction form
    6,392.64/9,581.64 = 2,689.32/x
  3. Step 3: Cross multiply
    6,392.64x = 9,581.64 × 2,689.32
  4. Step 4: Simplify right side
    6,392.64x = 25,768,096.08
  5. Step 5: Solve for x
    x = 25,768,096.08/6,392.64
  6. Step 6: Final answer
    x = 4,030.90

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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.