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Finding the Fourth Proportional to 43,755.36, 65,635.92 and 12,590.88

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Solution

The fourth proportional to 43,755.36, 65,635.92 and 12,590.88 is: 18,887.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,755.36 : 65,635.92 = 12,590.88 : x
  2. Step 2: Convert to fraction form
    43,755.36/65,635.92 = 12,590.88/x
  3. Step 3: Cross multiply
    43,755.36x = 65,635.92 × 12,590.88
  4. Step 4: Simplify right side
    43,755.36x = 826,413,992.41
  5. Step 5: Solve for x
    x = 826,413,992.41/43,755.36
  6. Step 6: Final answer
    x = 18,887.15

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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.