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Finding the Fourth Proportional to 28,112.42, 42,168.63 and 7,335.74

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Solution

The fourth proportional to 28,112.42, 42,168.63 and 7,335.74 is: 11,003.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,112.42 : 42,168.63 = 7,335.74 : x
  2. Step 2: Convert to fraction form
    28,112.42/42,168.63 = 7,335.74/x
  3. Step 3: Cross multiply
    28,112.42x = 42,168.63 × 7,335.74
  4. Step 4: Simplify right side
    28,112.42x = 309,338,105.84
  5. Step 5: Solve for x
    x = 309,338,105.84/28,112.42
  6. Step 6: Final answer
    x = 11,003.61

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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.