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Finding the Fourth Proportional to 12,636.52, 17,439.18 and 7,260.64

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Solution

The fourth proportional to 12,636.52, 17,439.18 and 7,260.64 is: 10,020.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,636.52 : 17,439.18 = 7,260.64 : x
  2. Step 2: Convert to fraction form
    12,636.52/17,439.18 = 7,260.64/x
  3. Step 3: Cross multiply
    12,636.52x = 17,439.18 × 7,260.64
  4. Step 4: Simplify right side
    12,636.52x = 126,619,607.88
  5. Step 5: Solve for x
    x = 126,619,607.88/12,636.52
  6. Step 6: Final answer
    x = 10,020.13

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1.5x scale

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.