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Finding the Fourth Proportional to 28,228.60, 42,342.92 and 7,170.22

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Solution

The fourth proportional to 28,228.60, 42,342.92 and 7,170.22 is: 10,755.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,228.60 : 42,342.92 = 7,170.22 : x
  2. Step 2: Convert to fraction form
    28,228.60/42,342.92 = 7,170.22/x
  3. Step 3: Cross multiply
    28,228.60x = 42,342.92 × 7,170.22
  4. Step 4: Simplify right side
    28,228.60x = 303,608,051.84
  5. Step 5: Solve for x
    x = 303,608,051.84/28,228.60
  6. Step 6: Final answer
    x = 10,755.34

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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.