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Finding the Fourth Proportional to 12,661.99, 18,996.28 and 7,401.49

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Solution

The fourth proportional to 12,661.99, 18,996.28 and 7,401.49 is: 11,104.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,661.99 : 18,996.28 = 7,401.49 : x
  2. Step 2: Convert to fraction form
    12,661.99/18,996.28 = 7,401.49/x
  3. Step 3: Cross multiply
    12,661.99x = 18,996.28 × 7,401.49
  4. Step 4: Simplify right side
    12,661.99x = 140,600,776.46
  5. Step 5: Solve for x
    x = 140,600,776.46/12,661.99
  6. Step 6: Final answer
    x = 11,104.16

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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.