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Finding the Fourth Proportional to 28,311.56, 42,467.36 and 7,251.68

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Solution

The fourth proportional to 28,311.56, 42,467.36 and 7,251.68 is: 10,877.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,311.56 : 42,467.36 = 7,251.68 : x
  2. Step 2: Convert to fraction form
    28,311.56/42,467.36 = 7,251.68/x
  3. Step 3: Cross multiply
    28,311.56x = 42,467.36 × 7,251.68
  4. Step 4: Simplify right side
    28,311.56x = 307,959,705.16
  5. Step 5: Solve for x
    x = 307,959,705.16/28,311.56
  6. Step 6: Final answer
    x = 10,877.53

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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.