Home / 31,390.55-43,321.64-17,781.02

Finding the Fourth Proportional to 31,390.55, 43,321.64 and 17,781.02

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Solution

The fourth proportional to 31,390.55, 43,321.64 and 17,781.02 is: 24,539.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,390.55 : 43,321.64 = 17,781.02 : x
  2. Step 2: Convert to fraction form
    31,390.55/43,321.64 = 17,781.02/x
  3. Step 3: Cross multiply
    31,390.55x = 43,321.64 × 17,781.02
  4. Step 4: Simplify right side
    31,390.55x = 770,302,902.82
  5. Step 5: Solve for x
    x = 770,302,902.82/31,390.55
  6. Step 6: Final answer
    x = 24,539.32

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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.