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Finding the Fourth Proportional to 20,562.89, 28,375.07 and 12,064.12

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Solution

The fourth proportional to 20,562.89, 28,375.07 and 12,064.12 is: 16,647.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,562.89 : 28,375.07 = 12,064.12 : x
  2. Step 2: Convert to fraction form
    20,562.89/28,375.07 = 12,064.12/x
  3. Step 3: Cross multiply
    20,562.89x = 28,375.07 × 12,064.12
  4. Step 4: Simplify right side
    20,562.89x = 342,320,208.71
  5. Step 5: Solve for x
    x = 342,320,208.71/20,562.89
  6. Step 6: Final answer
    x = 16,647.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.