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Finding the Fourth Proportional to 12,009.30, 18,008.55 and 4,611.30

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Solution

The fourth proportional to 12,009.30, 18,008.55 and 4,611.30 is: 6,914.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,009.30 : 18,008.55 = 4,611.30 : x
  2. Step 2: Convert to fraction form
    12,009.30/18,008.55 = 4,611.30/x
  3. Step 3: Cross multiply
    12,009.30x = 18,008.55 × 4,611.30
  4. Step 4: Simplify right side
    12,009.30x = 83,042,826.62
  5. Step 5: Solve for x
    x = 83,042,826.62/12,009.30
  6. Step 6: Final answer
    x = 6,914.88

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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.