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Finding the Fourth Proportional to 12,636.79, 18,955.08 and 3,276.79

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Solution

The fourth proportional to 12,636.79, 18,955.08 and 3,276.79 is: 4,915.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,636.79 : 18,955.08 = 3,276.79 : x
  2. Step 2: Convert to fraction form
    12,636.79/18,955.08 = 3,276.79/x
  3. Step 3: Cross multiply
    12,636.79x = 18,955.08 × 3,276.79
  4. Step 4: Simplify right side
    12,636.79x = 62,111,769.21
  5. Step 5: Solve for x
    x = 62,111,769.21/12,636.79
  6. Step 6: Final answer
    x = 4,915.15

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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.