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Finding the Fourth Proportional to 7,643.58, 11,455.65 and 3,256.62

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Solution

The fourth proportional to 7,643.58, 11,455.65 and 3,256.62 is: 4,880.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,643.58 : 11,455.65 = 3,256.62 : x
  2. Step 2: Convert to fraction form
    7,643.58/11,455.65 = 3,256.62/x
  3. Step 3: Cross multiply
    7,643.58x = 11,455.65 × 3,256.62
  4. Step 4: Simplify right side
    7,643.58x = 37,306,698.90
  5. Step 5: Solve for x
    x = 37,306,698.90/7,643.58
  6. Step 6: Final answer
    x = 4,880.79

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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.