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Finding the Fourth Proportional to 12,022.80, 18,001.80 and 9,430.80

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Solution

The fourth proportional to 12,022.80, 18,001.80 and 9,430.80 is: 14,120.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,022.80 : 18,001.80 = 9,430.80 : x
  2. Step 2: Convert to fraction form
    12,022.80/18,001.80 = 9,430.80/x
  3. Step 3: Cross multiply
    12,022.80x = 18,001.80 × 9,430.80
  4. Step 4: Simplify right side
    12,022.80x = 169,771,375.44
  5. Step 5: Solve for x
    x = 169,771,375.44/12,022.80
  6. Step 6: Final answer
    x = 14,120.79

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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.