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Finding the Fourth Proportional to 18,004.80, 27,015.30 and 8,641.20

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Solution

The fourth proportional to 18,004.80, 27,015.30 and 8,641.20 is: 12,965.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,004.80 : 27,015.30 = 8,641.20 : x
  2. Step 2: Convert to fraction form
    18,004.80/27,015.30 = 8,641.20/x
  3. Step 3: Cross multiply
    18,004.80x = 27,015.30 × 8,641.20
  4. Step 4: Simplify right side
    18,004.80x = 233,444,610.36
  5. Step 5: Solve for x
    x = 233,444,610.36/18,004.80
  6. Step 6: Final answer
    x = 12,965.69

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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.