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Finding the Fourth Proportional to 12,001.80, 18,000.30 and 5,761.80

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Solution

The fourth proportional to 12,001.80, 18,000.30 and 5,761.80 is: 8,641.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,001.80 : 18,000.30 = 5,761.80 : x
  2. Step 2: Convert to fraction form
    12,001.80/18,000.30 = 5,761.80/x
  3. Step 3: Cross multiply
    12,001.80x = 18,000.30 × 5,761.80
  4. Step 4: Simplify right side
    12,001.80x = 103,714,128.54
  5. Step 5: Solve for x
    x = 103,714,128.54/12,001.80
  6. Step 6: Final answer
    x = 8,641.55

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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.