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Finding the Fourth Proportional to 28,163.56, 42,247.62 and 7,387

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Solution

The fourth proportional to 28,163.56, 42,247.62 and 7,387 is: 11,081.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,163.56 : 42,247.62 = 7,387 : x
  2. Step 2: Convert to fraction form
    28,163.56/42,247.62 = 7,387/x
  3. Step 3: Cross multiply
    28,163.56x = 42,247.62 × 7,387
  4. Step 4: Simplify right side
    28,163.56x = 312,083,168.94
  5. Step 5: Solve for x
    x = 312,083,168.94/28,163.56
  6. Step 6: Final answer
    x = 11,081.10

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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.