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Finding the Fourth Proportional to 12,636.89, 18,955.37 and 7,018.03

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Solution

The fourth proportional to 12,636.89, 18,955.37 and 7,018.03 is: 10,527.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,636.89 : 18,955.37 = 7,018.03 : x
  2. Step 2: Convert to fraction form
    12,636.89/18,955.37 = 7,018.03/x
  3. Step 3: Cross multiply
    12,636.89x = 18,955.37 × 7,018.03
  4. Step 4: Simplify right side
    12,636.89x = 133,029,250.46
  5. Step 5: Solve for x
    x = 133,029,250.46/12,636.89
  6. Step 6: Final answer
    x = 10,527.05

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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.