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Finding the Fourth Proportional to 8,624.79, 12,940.38 and 3,698.28

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Solution

The fourth proportional to 8,624.79, 12,940.38 and 3,698.28 is: 5,548.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,624.79 : 12,940.38 = 3,698.28 : x
  2. Step 2: Convert to fraction form
    8,624.79/12,940.38 = 3,698.28/x
  3. Step 3: Cross multiply
    8,624.79x = 12,940.38 × 3,698.28
  4. Step 4: Simplify right side
    8,624.79x = 47,857,148.55
  5. Step 5: Solve for x
    x = 47,857,148.55/8,624.79
  6. Step 6: Final answer
    x = 5,548.79

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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.