Home / 31,631.22-43,687.86-21,002.40

Finding the Fourth Proportional to 31,631.22, 43,687.86 and 21,002.40

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Solution

The fourth proportional to 31,631.22, 43,687.86 and 21,002.40 is: 29,007.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,631.22 : 43,687.86 = 21,002.40 : x
  2. Step 2: Convert to fraction form
    31,631.22/43,687.86 = 21,002.40/x
  3. Step 3: Cross multiply
    31,631.22x = 43,687.86 × 21,002.40
  4. Step 4: Simplify right side
    31,631.22x = 917,549,910.86
  5. Step 5: Solve for x
    x = 917,549,910.86/31,631.22
  6. Step 6: Final answer
    x = 29,007.73

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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.