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Finding the Fourth Proportional to 28,119.92, 42,179.88 and 7,343.24

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Solution

The fourth proportional to 28,119.92, 42,179.88 and 7,343.24 is: 11,014.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,119.92 : 42,179.88 = 7,343.24 : x
  2. Step 2: Convert to fraction form
    28,119.92/42,179.88 = 7,343.24/x
  3. Step 3: Cross multiply
    28,119.92x = 42,179.88 × 7,343.24
  4. Step 4: Simplify right side
    28,119.92x = 309,736,982.01
  5. Step 5: Solve for x
    x = 309,736,982.01/28,119.92
  6. Step 6: Final answer
    x = 11,014.86

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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.