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Finding the Fourth Proportional to 18,438.64, 27,659.68 and 7,342.65

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Solution

The fourth proportional to 18,438.64, 27,659.68 and 7,342.65 is: 11,014.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438.64 : 27,659.68 = 7,342.65 : x
  2. Step 2: Convert to fraction form
    18,438.64/27,659.68 = 7,342.65/x
  3. Step 3: Cross multiply
    18,438.64x = 27,659.68 × 7,342.65
  4. Step 4: Simplify right side
    18,438.64x = 203,095,331.00
  5. Step 5: Solve for x
    x = 203,095,331.00/18,438.64
  6. Step 6: Final answer
    x = 11,014.66

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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.