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Finding the Fourth Proportional to 12,005.80, 18,008.70 and 6,173.80

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Solution

The fourth proportional to 12,005.80, 18,008.70 and 6,173.80 is: 9,260.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,005.80 : 18,008.70 = 6,173.80 : x
  2. Step 2: Convert to fraction form
    12,005.80/18,008.70 = 6,173.80/x
  3. Step 3: Cross multiply
    12,005.80x = 18,008.70 × 6,173.80
  4. Step 4: Simplify right side
    12,005.80x = 111,182,112.06
  5. Step 5: Solve for x
    x = 111,182,112.06/12,005.80
  6. Step 6: Final answer
    x = 9,260.70

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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.