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Finding the Fourth Proportional to 28,057.56, 42,100.02 and 11,421.78

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Solution

The fourth proportional to 28,057.56, 42,100.02 and 11,421.78 is: 17,138.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,057.56 : 42,100.02 = 11,421.78 : x
  2. Step 2: Convert to fraction form
    28,057.56/42,100.02 = 11,421.78/x
  3. Step 3: Cross multiply
    28,057.56x = 42,100.02 × 11,421.78
  4. Step 4: Simplify right side
    28,057.56x = 480,857,166.44
  5. Step 5: Solve for x
    x = 480,857,166.44/28,057.56
  6. Step 6: Final answer
    x = 17,138.24

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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.