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Finding the Fourth Proportional to 28,137.92, 42,206.88 and 7,361.24

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Solution

The fourth proportional to 28,137.92, 42,206.88 and 7,361.24 is: 11,041.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,137.92 : 42,206.88 = 7,361.24 : x
  2. Step 2: Convert to fraction form
    28,137.92/42,206.88 = 7,361.24/x
  3. Step 3: Cross multiply
    28,137.92x = 42,206.88 × 7,361.24
  4. Step 4: Simplify right side
    28,137.92x = 310,694,973.33
  5. Step 5: Solve for x
    x = 310,694,973.33/28,137.92
  6. Step 6: Final answer
    x = 11,041.86

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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.