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Finding the Fourth Proportional to 12,173.45, 18,260.19 and 2,939.45

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Solution

The fourth proportional to 12,173.45, 18,260.19 and 2,939.45 is: 4,409.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,173.45 : 18,260.19 = 2,939.45 : x
  2. Step 2: Convert to fraction form
    12,173.45/18,260.19 = 2,939.45/x
  3. Step 3: Cross multiply
    12,173.45x = 18,260.19 × 2,939.45
  4. Step 4: Simplify right side
    12,173.45x = 53,674,824.19
  5. Step 5: Solve for x
    x = 53,674,824.19/12,173.45
  6. Step 6: Final answer
    x = 4,409.17

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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.