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Finding the Fourth Proportional to 18,439.80, 27,657.86 and 7,343.50

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Solution

The fourth proportional to 18,439.80, 27,657.86 and 7,343.50 is: 11,014.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,439.80 : 27,657.86 = 7,343.50 : x
  2. Step 2: Convert to fraction form
    18,439.80/27,657.86 = 7,343.50/x
  3. Step 3: Cross multiply
    18,439.80x = 27,657.86 × 7,343.50
  4. Step 4: Simplify right side
    18,439.80x = 203,105,494.91
  5. Step 5: Solve for x
    x = 203,105,494.91/18,439.80
  6. Step 6: Final answer
    x = 11,014.52

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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.