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Finding the Fourth Proportional to 28,874.80, 39,840.42 and 16,297.12

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Solution

The fourth proportional to 28,874.80, 39,840.42 and 16,297.12 is: 22,486.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,874.80 : 39,840.42 = 16,297.12 : x
  2. Step 2: Convert to fraction form
    28,874.80/39,840.42 = 16,297.12/x
  3. Step 3: Cross multiply
    28,874.80x = 39,840.42 × 16,297.12
  4. Step 4: Simplify right side
    28,874.80x = 649,284,105.59
  5. Step 5: Solve for x
    x = 649,284,105.59/28,874.80
  6. Step 6: Final answer
    x = 22,486.19

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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.